Develop custom conversations using dialog directives

Dialog Code Challenge

_Scenario 3: Create a custom intent confirmation that provides the price to the user_

When an intent request has potentially high consequences, it's good practice to confirm the request with the user and mention those potential consequences. For example, if users ask to book a flight to Miami, they should know the cost of the flight before confirming the intent. They may change their minds if it's too expensive.

In this case, `speechOutput` and `repromptSpeech` in the intent confirmation would mention the price of the flight:
```js
this.emit(':confirmIntent', speechOutput, repromptSpeech);
```

#### How to access values
These values have already been stored as variables for you:
```js
const departureCityRequestedByUser = 'new york'; //defaulting departureCity to new york
const arrivalCityRequestedByUser = this.event.request.intent.slots.arrivalCity.value;
const departureDateRequestedByUser = this.event.request.intent.slots.departureDate.value;
const departureDateConfirmationStatus = this.event.request.intent.slots.departureDate.confirmationStatus;
const intentConfirmationStatus = this.event.request.intent.confirmationStatus;
```

#### How to determine price
The price of the flight can accessed with:
```js
const recommendedFlight = flights
[departureCityRequestedByUser.toLowerCase()]
[arrivalCityRequestedByUser.toLowerCase()]
[departureDateRequestedByUser];

const price = recommendedFlight['price'];
```







Scenario 3

Welcome to the Dialog Management Code Challenge!

In each scenario of this Code Challenge, you'll be given a set of conversations and a starting **index.js**. Based on the conversations, you will determine which dialog directive must be used to recreate those dialogs. Let's review the syntax for the four directives you will be using:
```js
this.emit(':delegate');
```

```js
this.emit(':elicitSlot', slotToElicit, speechOutput, repromptSpeech, updatedIntent);
```

```js
this.emit(':confirmSlot', slotToConfirm, speechOutput, repromptSpeech, updatedIntent);
```

```js
this.emit(':confirmIntent', speechOutput, repromptSpeech, updatedIntent);
```


Challenge Intro

You've managed dialog and managed it well. Users booking flights will be much happier when they are:
- provided their available options in slot elicitations, 
- notified of default values via slot confirmation, and 
- understand the cost of the intent before confirming it.

All of the **index.js** files are created so that they can be copy-and-pasted into <a href="https://aws.amazon.com?&sc_category=Earned&sc_channel=RD&sc_campaign=DialogManagement&sc_publisher=Codecademy&sc_content=Content&sc_detail=Design_Course&sc_funnel=Visit&sc_country=WW&sc_medium=Earned_RD_DialogManagement_Codecademy_Content_Design_Course_Visit_WW_AdvancedDevs&sc_segment=AdvancedDevs" target="_blank" rel="noopener noreferrer">Lambda</a>. You can test each one for yourself by pasting it into a Lambda function, connecting it to the Flight Booker interaction model, and running the example conversations.

If you don't have it already, download the Flight Booker interaction model JSON from <a href="https://content.codecademy.com/courses/alexa/learn-alexa-dialog-management/1-flight-booker-final-interaction-model.json" target="_blank" rel="noopener noreferrer">this link</a>. This can be pasted into the **JSON Editor** in the <a target="_blank" rel="noopener noreferrer" href="https://developer.amazon.com/alexa/console/ask?&sc_category=Earned&sc_channel=RD&sc_campaign=DialogManagement&sc_publisher=Codecademy&sc_content=Content&sc_detail=Design_Course&sc_funnel=Visit&sc_country=WW&sc_medium=Earned_RD_DialogManagement_Codecademy_Content_Design_Course_Visit_WW_AdvancedDevs&sc_segment=AdvancedDevs">Alexa Developer Console</a>.


#### More Alexa Resources

- <a href="https://forums.developer.amazon.com/spaces/165/index.html?&sc_category=Earned&sc_channel=RD&sc_campaign=DialogManagement&sc_publisher=Codecademy&sc_content=Content&sc_detail=Design_Course&sc_funnel=Visit&sc_country=WW&sc_medium=Earned_RD_DialogManagement_Codecademy_Content_Design_Course_Visit_WW_AdvancedDevs&sc_segment=AdvancedDevs" target="_blank" rel="noopener noreferrer">Alexa Developer Forums</a>
- <a href="https://alexa.design/guide?&sc_category=Earned&sc_channel=RD&sc_campaign=DialogManagement&sc_publisher=Codecademy&sc_content=Content&sc_detail=Design_Course&sc_funnel=Visit&sc_country=WW&sc_medium=Earned_RD_DialogManagement_Codecademy_Content_Design_Course_Visit_WW_AdvancedDevs&sc_segment=AdvancedDevs" target="_blank" rel="noopener noreferrer">Alexa Voice Design Guide</a>
- <a href="https://developer.amazon.com/en-US/alexa/alexa-skills-kit/dialog-management" target="_blank" rel="noopener noreferrer">Alexa Blogs on Dialog Management</a>
- <a href="https://github.com/alexa" target="_blank" rel="noopener noreferrer">Alexa code samples and templates</a> on GitHub
- <a href="https://twitter.com/alexadevs" target="_blank" rel="noopener noreferrer">AlexaDevs</a> on Twitter




Review


_Scenario 1: Create a custom prompt to elicit the `arrivalCity` slot value._

In the Flight Booker skill, the available flight destinations may change over time. Those available offerings, or options, should be clear to users, and the skill should be able to notify its users as they change. 

We can solve this by using custom dialog management to check the available destinations in the Lambda function and respond accordingly. Those destinations can be included in the `speechOutput` and `repromptSpeech` during slot elicitation:

```js
this.emit(':elicitSlot', slotToElicit, speechOutput, repromptSpeech);
```

You won't need the `updatedIntent` parameter for this exercise.


Scenario 1

_Scenario 2: Set a default value for `departureCity` and create a custom prompt to confirm that slot value_

If your skill needs many slot values, it may frustrate users to answer many slot elicitations. In that case, your skill can set default values &mdash; but it should notify users of the values it assumes! For example, if the Flight Booker skill is only available to New York travelers, it may set "New York" as its default departure city, but it should inform its users via a slot confirmation:

```js
this.emit(':confirmSlot', slotToConfirm, speechOutput, repromptSpeech, updatedIntent);
```

where the default slot value is set in `updatedIntent` and mentioned in `speechOutput` and `repromptSpeech`.


#### How to access values

Access `departureCity` value and confirmation status like this:
```js
this.event.request.intent.slots.departureCity.value;
this.event.request.intent.slots.departureCity.confirmationStatus;
```

#### How to set default values

Set the a default value for `departureCity` by copying the existing intent and editing the value:
```js
const updatedIntent = this.event.request.intent;
updatedIntent.slots.departureCity.value = 'new york';
```




