Personalization of the message in private messages

Hello,
Recently I had a super cool idea that came to me, why not make sure that when someone sends us a private message while our private message is closed, that we can personalize (in the parameters) the message Clyde sends

it could make the message nicer, make a more advanced message like "Hello, I am not contactable in order to avoid mp abuse, for any contact send me an email to example@no-mail.com or add me as friends "