A twilio function used for NLU

speech_ai.js

/**
 *  Hindi Voice Bot
 * 
 *  This function lets you ask questions in Hindi and get a proper response 
 */
exports.handler = function(context, event, callback) {
    let twiml = new Twilio.twiml.VoiceResponse()
    if(event.SpeechResult) {
        var got = require('got');
        var requestPayload = {
            lang: 'hi',
             query: event.SpeechResult,
             sessionId: '12345'};
        
        got.post('https://api.dialogflow.com/v1/query?v=20150910', 
          { body: JSON.stringify(requestPayload), 
            headers: { 
              Authorization: 'Bearer ' + context.AUTH_TOKEN,
              'accept': 'application/json',
              'Content-Type': 'application/json' 
          }
        }).then(function(response) {
          body = JSON.parse(response.body)
          twiml.gather({input: 'speech', language: 'hi-IN'})
               .say(body.result.fulfillment.speech)
          callback(null, twiml);
        }).catch(function(error) {
          console.log(error)
          callback(error)
        });
    }
    else{
        twiml.gather({input: 'speech', language: 'hi-IN'})
             .say('Namaste. Aap muzse bharat se judey kuchh sawaal puchh sakte hai', { voice: 'Polly.Aditi'})
        callback(null, twiml)
    }
}