© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.

Jhen-Wei Huang (黃振維)Solutions Architect, AWS

Integrate Your Amazon Lex Chatbot with Any Messaging Service

October 12, 2017

Sponsor

Overview

• “Alexa, What is Amazon Lex?”• Going Serverless (AWS Lambda & Amazon API

Gateway)• Integrating with Facebook• Teach Your Bot How to Text with Twilio SMS• Can we talk? Adding Support for Voice

The Need for Amazon Lex

Amazon LexGraphical User Interface

Conversational Interface

Text and Speech Language Understanding

SpeechRecognition

Natural Language Understanding

Powered by the same Deep Learning technology as Alexa

Lex Bot Structure

UtterancesSpoken or typed phrases that invoke your intent

BookHotelIntentsAn Intent performs an action in response to natural language user input

SlotsSlots are input data required to fulfill the intent

FulfillmentFulfillment mechanism for your intent

“Book a Hotel”

Book HotelTaipei

“Book a Hotel in Taipei”

Automatic Speech Recognition

Hotel Booking

Taipei City

Natural Language Understanding

Intent/Slot Model

UtterancesHotel BookingCity Taipei CityCheck In Nov 30th

Check Out Dec 2nd

“Your hotel is booked for Nov 30th”

Amazon Polly

Confirmation: “Your hotel is booked for Nov 30th”

ain

“Can I go ahead with the booking?

Versioning and Alias Support

AliasVersioning

v1 v2 v3 latest

• Supported for Intents, Slots and Bots• Enables multi-developer environment• Rollback to previous versions

v1 Dev

v2 Stage

v3 Prod

• Deploy different aliases to different platforms• Run different stacks for dev, stage and prod

environments• Target different user groups with different

aliases

Save, Build, Test, and Publish

Save BuildPreserve the current state on the server

Create versions you can test

PublishCreate a version of your bot with an alias for your clients

TestTest your bot in a chat window on the console

Amazon Lex: Use Cases

Informational BotsManage everyday consumer requests

Application BotsBuild powerful interfaces to mobile applications

• News updates• Weather information• FAQs ….

• Book tickets• Order food• Manage bank accounts ….

Enterprise Productivity BotsStreamline enterprise work activities

• Check sales numbers• Marketing performance• Inventory status ….

Internet of Things (IoT) BotsEnable conversational interfaces for device interactions

• Wearables• Appliances• Auto ….

Lex Console: Designed for Builders

Serverless, event-driven compute service

AWS Lambda = microservice without servers

AWS Lambda

Components of AWS Lambda

• An AWS Lambda function (that you write) • An event source• The AWS Lambda service• The function networking environment

Amazon API Gateway

Create Configure Publish

Maintain Monitor Secure

Fully Managed Service for Your APIs

Built-in integrating Amazon Lex with Facebook

#1: Create Facebook App

http://docs.aws.amazon.com/lex/latest/dg/fb-bot-association.html

#2: Create Page

#3: Create Page Access Token

#4: Create Lex Bot

#5: Setup Facebook Channel

#6: Setup Webhook

Testing the Integration

Integrating Amazon Lex with Twilio SMS

Amazon LexLambdaFunction

Amazon API Gateway

End User Twilio Programmable

SMS

Architecture / Message Flow

https://aws.amazon.com/blogs/ai/integrate-your-amazon-lex-bot-with-any-messaging-service/

Multi-Bot Design

“Concierge” Bot

AWS LambdaFunction

Amazon API Gateway

End User Multiple Messaging Services

AmazonDynamoDB

“Flight-Booking” Bot

“Cruise-Booking” Bot

user-id current-intent

bot ttl

867-5309 BookCruise Cruise-Booking 1494013599

“I want to book a cruise”

#1: Creating an Amazon Lex bothttps://console.aws.amazon.com/lex/home?region=us-east-1

#2: Setting up a Twilio Phone Numberhttps://www.twilio.com/try-twilio

#3: IAM Policy & the AWS Lambda Function{

"Version": "2012-10-17","Statement": [

{"Effect": "Allow","Action": [

"logs:CreateLogGroup","logs:CreateLogStream","logs:PutLogEvents"

],"Resource": [

"*"]

},{

"Effect": "Allow","Action": [

"lex:PostText"],"Resource": [

"*"]

}]

}

AWS.config.region = 'us-east-1';

var lexruntime = new AWS.LexRuntime();

var userNumber = twilioSMS.From.replace('+', '');

var params = {

botAlias: process.env.BOT_ALIAS,

botName: process.env.BOT_NAME,

inputText: twilioSMS.Body,

userId: userNumber,

sessionAttributes: {

}

};

lexruntime.postText(params, function(err, data) {

var twimlResponse = new twilio.TwimlResponse();

if (err) {

console.log(err, err.stack); // an error occurred

twimlResponse.message('Sorry, we ran into a problem at our end.');

callback(err, twimlResponse.toString());

} else {

console.log(data); // got something back from Amazon Lex

twimlResponse.message(data.message);

callback(null, twimlResponse.toString());

}

});

#4: HTTPS Endpoint using Amazon API Gateway

#5: Configuring the Twilio Webhook

https://www.twilio.com/console

Your bot can now text!

Adding Support for Voice

• Amazon Lex can support both Text and Voice• Use the Twilio <record> verb to prompt/record user input• Utilize Amazon Lex’s PostContent API call (instead of

PostText)• Accept: text/plain

• Convert to TwiML and send back to Twilio

Getting Started

https://console.aws.amazon.com/lex

Remember to complete your evaluations!

Thank you!Get Started: https://aws.amazon.com/lexLex Console: https://console.aws.amazon.com/lex