Dynamically disable Messenger message composer

It can be done in three simple steps easily and it will help you to decide whether you can get the user input through buttons or through the keyboard. 

Enable/disable message composer

Step 1: Go to the flow in which you have to use this feature,

Step 2: Click the “Action” >> Messenger >> “Enable Message Composer/Disable Message Composer” on the list.

Step 3: That’s it