How to make an Inform intent

Hi there

I have a similar challange as leonardoaii71. If a passwort-reset/change chatbot, A user should be able to input the username of another user in order to reset/unlock the account. Unfortunately the usernames does not follow a exact pattern. Pattern could be: max n-char before and after a point. This regex this maybe no very accurate.

Any other idea? Is is possible to force the next user input to be put in a specific entity?

Thanks four your help.