Using the AWS Lex API with the AWS SDK

api.js

let AWS = require('aws-sdk')

let credentials = new AWS.SharedIniFileCredentials({profile: 'default'});
AWS.config.credentials = credentials;
AWS.config.update({region: 'us-east-1'});

let lexruntime = new AWS.LexRuntime({
	apiVersion: '2016-11-28',
});

let params = {
  botAlias: '$LATEST', /* required */
  botName: 'BookTrip', /* required */
  inputText: 'I want a make hotel reservations', /* required */
  userId: '4o9s3dhx6nlhe038dbn3s3fujd3118f5w', /* required */
  sessionAttributes: {
    someKey: 'STRING_VALUE',
    /* anotherKey: ... */
  }
};

lexruntime.postText(params, function (err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});