How to stay in dialog triggered by LUIS nodejs - node.js

Question

I'm playing a bit with chatbots using Bot Framework from MS.
I created one supposed to book a flight, and it has LUIS integrated.
My question is: once I'm in the flight booking dialog triggered by LUIS, I want to check if all the informations regarding the flight are given by the user (departure city, arrival city, date, airline...). So if I'm missing an info, for example the city of departure, the bot will ask 'can you give me the departure city?' qnd if I write 'from London', LUIS detects that as a new flight reservation and triggers another dialog. but I want it to stay in the dialog obviously!
Here is the dialog code so far, just in case if departure city is missing:
// Main dialog with LUIS
bot.dialog('FlightBookingDialog', [
function (session, args, next) {
// Resolve and store any entity passed from LUIS.
var intent = args.intent;
session.dialogData.airline = builder.EntityRecognizer.findEntity(intent.entities, 'Airline');
session.dialogData.class = builder.EntityRecognizer.findEntity(intent.entities, 'Class');
session.dialogData.date_time = builder.EntityRecognizer.findEntity(intent.entities, 'builtin.datetimeV2');
session.dialogData.departure = builder.EntityRecognizer.findEntity(intent.entities, 'Departure');
session.dialogData.destination = builder.EntityRecognizer.findEntity(intent.entities, 'Destination');
session.dialogData.number_tickets = builder.EntityRecognizer.findEntity(intent.entities, 'number');
session.send("I see you want to travel, great !");
if(!session.dialogData.departure) {
builder.Prompts.text(session, "Can you specify me a departure city please ?");
} else {
next();
}
},
function (session, args, results, next) {
if (results.response) {
builder.LuisRecognizer.recognize(session.message.text, luisModelUrl,
function(err, intents, entities) {
if(entities) {
var departure = builder.EntityRecognizer.findEntity(intents.entities, 'Departure');
if (departure) {
session.dialogData.departure = departure;
}
}
}
);
};
session.send("Good !");
},
]).triggerAction({
matches: 'FlightBooking'
});

Answer 1

If I understand correctly, I think you can update the code to have multiple matches. From this documentation page the code may be updated to look like this:
var intents = new builder.IntentDialog({ recognizers: [recognizer] })
.matches('Greeting', (session) => {
session.send('You reached Greeting intent, you said \'%s\'.', session.message.text);
})
.matches('Note.Create', [(session, args, next) => {
// Resolve and store any Note.Title entity passed from LUIS.
var intent = args.intent;
var title = builder.EntityRecognizer.findEntity(intent.entities, 'Note.Title');
var note = session.dialogData.note = {
title: title ? title.entity : null,
};
// Prompt for title
if (!note.title) {
builder.Prompts.text(session, 'What would you like to call your note?');
} else {
next();
}
},
(session, results, next) => {
var note = session.dialogData.note;
if (results.response) {
note.title = results.response;
}
// Prompt for the text of the note
if (!note.text) {
builder.Prompts.text(session, 'What would you like to say in your note?');
} else {
next();
}
},
(session, results) => {
var note = session.dialogData.note;
if (results.response) {
note.text = results.response;
}
// If the object for storing notes in session.userData doesn't exist yet, initialize it
if (!session.userData.notes) {
session.userData.notes = {};
console.log("initializing session.userData.notes in CreateNote dialog");
}
// Save notes in the notes object
session.userData.notes[note.title] = note;
// Send confirmation to user
session.endDialog('Creating note named "%s" with text "%s"',
note.title, note.text);
}])
Note that there is no endDialog method until the end when the bot has all the information it needs to process the request.
Hope that helps or at least gets you on the right path!

Answer 2

I found the solution here:
https://github.com/Microsoft/BotFramework-Samples/tree/master/docs-samples/Node/basics-naturalLanguage
They are exactly talking about my problem, I post it here so people in the same situation can see it.
You have to go to the IntentDialog part, Ctrl+F it.