Hi I think there should be an option of automatic replying. There should be an option by using that we could save our text and turn that option on for a limited time. And then app should reply everyone automatically that saved text.
For Example:
I am sleeping in my room and someone text me. The app should automatically reply "I am sleeping will reply you after awaking up".
Or
While I am driving or riding a bike it should automatically say that "I am driving" or "I am riding a bike".