How to block users from getting messages?

Hey everyone,

I have an internal messaging system in Rails 6.

I was wondering how can I add the logic for a button to block the user in conversation that I'm messaging with.

My setup and details are available on my reddit post :

https://www.reddit.com/r/rails/comments/j3eszd/how_to_block_users_from_getting_messages/

Any help is appreciated on how to approach this!
Many thanks.