In this article, we demonstrate how to build a smart chatbot for your SMS conversations using OpenAI GPT-3 and Fly.io. We show you how to use the OpenAI API to generate intelligent responses to incoming messages, and how to use Twilio to handle the SMS messaging. We also show you how to deploy the chatbot for free using Fly.io, making it easy to get started building your own chatbot. With just a few lines of code, you can build a chatbot that can hold intelligent conversations over SMS.