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Build a Chatbot with Amazon Lex

Evan Selunani
5 min readNov 12, 2024

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As I take a short breather from my DevOps work, I thought I’d dive into a quick side project: building a chatbot with Amazon Lex! In this mini-guide, we’ll create a basic chatbot that greets users and provides simple feedback — just enough to get a feel for Amazon Lex’s features without getting too deep into advanced configurations.

What You’ll Learn

In this guide, we’ll cover some new terms and concepts, including:

— Lex Chatbot: Amazon Lex’s chatbot service, which enables conversational interactions.

— NewIntent: The purpose or action the chatbot fulfills in response to user requests.

— Intent Classification Confidence Score Threshold: The confidence level Amazon Lex requires to match a user’s input with an intent.

— FallbackIntent: A default response the chatbot provides when it can’t match the user’s input with any defined intent.

— Variations: Variations are literally variations of the same Message in the main Message box

Step-by-Step Guide

Here’s what we’ll do in this tutorial:

  1. Set Up Your Lex Chatbot: Create and configure a new chatbot in Amazon Lex.
  2. Create Your First Intent: Define an initial intent that lets the bot greet users and respond to basic inputs.
  3. Manage FallbackIntent: Handle situations when the bot doesn’t recognize the user’s input by setting up fallback…

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Evan Selunani
Evan Selunani

Written by Evan Selunani

Transforming the world, one keystroke at a time.| Certified AWS Cloud Practitioner.

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