https://chatbotsmagazine.com/how-to-design-an-alexa-handsfree-messenger-skill-31e6a893c6e2

Learn how to create a Handsfree Messenger Skill in this tutorial by Madhur Bhargava, a specialist in various mobile/embedded technologies.

This article will teach you an Alexa skill, which you can call Handsfree Messenger, and it will allow the user to leverage Alexa to send SMSes in a hands-free manner, just using Alexa and Echo, without any interaction with his/her phone. You’ll use a custom service called Twilio, which allows a user/developer to make/receive phone calls programmatically and send/receive text messages using web service APIs, in addition to AWS, where you will be hosting your Lambda.