This is a tricky question that i don't know if there will

Hi
This is a tricky question that i don't know if there will be response.

I am using membership with appointmen and i know that for been confirmed an appointment automaticly after taking it, has to be checked "auto confirm" and not checked "payment required".
But here is the question

if i have a client that is user and a type of user that has a dicount of 100% so it has not to pay nothing. but of course for the rest of people payment is required .
So there is any way for this type of client to confirm automaticly the appointment without the necesity of being confirmed by the admin?

Thanks