The article provides a step-by-step guide to building an SMS chatbot that recommends Hamilton songs based on the user's sentiment using Twilio Programmable SMS, Microsoft Azure Cognitive Services, and JavaScript. The bot uses a naive Bayesian classifier to analyze the user's input and match it with corresponding Hamilton song descriptions. To set up the bot, users need to create a Twilio account, configure their phone number, and sign up for a free Microsoft Azure account. They also need to install the required dependencies, including @azure/ai-text-analytics and Whichx, and configure their Azure endpoint and key as environment variables. The complete code for the bot can be found on GitHub. After setting up the bot, users can text their Twilio number how they're feeling to receive a recommended Hamilton song based on their sentiment.