This tutorial demonstrates how to build a low-code SMS RSVP system using Airtable, Twilio Functions, and Twilio Studio. The system allows users to create an Airtable base with a guest list, send personalized messages to each guest via Twilio Functions, and update the Airtable records with the responses from each invitee. The tutorial covers setting up the Airtable base, gathering credentials, integrating Airtable with Twilio Functions, modifying the broadcast-sms function, testing the system, and setting up a Twilio Studio Flow to handle incoming messages and respond accordingly. The system is designed to be serverless, reducing maintenance time, and can be customized to suit specific needs.