What did I just say?

I absolutely hate when people call and ask a question but don't listen to the answer. 

Caller: "Do you take reservations?"
Me: "No, we are first come first serve."
Caller: "What about call ahead seating?"
Me: "No, that would technically be a reservation and we are only first come first serve."
Caller: " Not even for a large group of people??"
Me: "No, not even for large parties. We are first come first serve for all guests."

Don't keep questioning me hoping that I will change my mind.  I won't.  All the repeat questions do is irritate me and make me go into snooty server mode.