Twilio / Assembly AI / NodeJS / AWS Lambda realtime transcription

We need a Node JS script that will work within an AWS Lamba functions.

The end user workflow we want is:
- User phones a Twilio phone number
- Response asks the user to give a description of their call
- Voice data is sent off to Assembly AI and and when the transcript is returned, the transcript is sent in a SMS to a hardcoded phone number.

We would like this to be implemented in Node JS, and using AssemblyAI node packages.

This code MUST be compatible within AWS lambda.

The configuration can be simplistic at the top of the file as JS consts:
- Twilo API keys
- Assembly API keys
- Phone numbers to send SMS

You must have:
- Proven experience with Node.js
- Deep understanding of AWS Lambda
- Familiarity with Twilio's API
- Previous work with Assembly API
- SMS integration experience