Exiting from ability on another command

[vicmosin]

I do have an ability which handles user's input with reply method. Now, imagine the following:

User: /set-age
Bot: what's your age?
User: /some-command
Bot: I am sorry, you input should be a digit

What I want to achieve is that once bot in some particular command and user uses another command, bot should stop handling the previous command and switch to a new one.
Could not find such functionality in docs