bot.js

'use strict';
const builder = require('botbuilder');

const connector = new builder.ChatConnector({
    appId: process.env.MICROSOFT_APP_ID,
    appPassword: process.env.MICROSOFT_APP_PASSWORD
});


var inMemoryStorage = new builder.MemoryBotStorage();

const bot = module.exports = new builder.UniversalBot(connector, [

    (session, args, next) => {
        session.send(`Hi there! I'm a sample bot showing how multiple dialogs work.`);
        session.send(`Let's start the first dialog, which will ask you your name.`);
        session.beginDialog('getName');
    },
    (session, results, next) => {
       
        if (results.response) {
            const name = session.privateConversationData.name = results.response;

            session.beginDialog('getAge', { name: name });
        } else {
            session.endConversation(`Sorry, I didn't understand the response. Let's start over.`);
        }
    },
    (session, results, next) => {
       
        if (results.response) {
            const age = session.privateConversationData.age = results.response;
            const name = session.privateConversationData.name;

            session.endConversation(`Hello ${name}. You are ${age}`);
        } else {
            session.endConversation(`Sorry, I didn't understand the response. Let's start over.`);
        }
    },
]).set('storage', inMemoryStorage); 

bot.dialog('getName', [
    (session, args, next) => {
        if(args) {
            session.dialogData.isReprompt = args.isReprompt;
        }
        builder.Prompts.text(session, 'What is your name?');
    },
    (session, results, next) => {
        const name = results.response;

        if (!name || name.trim().length < 3) {
            if (session.dialogData.isReprompt) {
                session.endDialogWithResult({ response: '' });
            } else {
                session.send('Sorry, name must be at least 3 characters.');

               
                session.replaceDialog('getName', { isReprompt: true });
            }
        } else {
           
            session.endDialogWithResult({ response: name.trim() });
        }
    }
]);

bot.dialog('getAge', [
    (session, args, next) => {
        let name = session.dialogData.name = 'User';

        if (args) {
            session.dialogData.isReprompt = args.isReprompt;

            name = session.dialogData.name = args.name;
        }

        builder.Prompts.number(session, `How old are you, ${name}?`);
    },
    (session, results, next) => {
        const age = results.response;

        if (!age || age < 13 || age > 90) {
            if (session.dialogData.isReprompt) {
                session.endDialogWithResult({ response: '' });
            } else {
                session.dialogData.didReprompt = true;
                session.send(`Sorry, that doesn't look right.`);
                session.replaceDialog('getAge', 
                    { name: session.dialogData.name, isReprompt: true });
            }
        } else {
           
            session.endDialogWithResult({ response: age });
        }
    }
]);