When I setup diary and have appointments activated I get a beep and a window
popping up at me some 10-12 minutes before the set time. Thats fine and
what I want.

After that it keeps prodding me. I want it only once!
I guess I can use m-x appt-delete but I am surprised that there is not a
single key available in the window that pops up which does that.

When I setup diary and have appointments activated I get a beep and a window popping up at me some 10-12 minutes before the set time.  Thats fine and what I want.
 
After that it keeps prodding me. I want it only once!
I guess I can use m-x appt-delete but I am surprised that there is not a single key available in the window that pops up which does that.