Ok, here's a basic cutscene - written by the greatest author of all time: yours truly (And, to an extent, is probably what your event command looks like).
There you have a basic talking scene between three heroes. One problem, though, they'll keep saying that over and over again! Oh no, what should we do!?
THIS.There it is, a switch operation that turns that particular cutscene into a bottomless abyss of nothingness (it will make the scene go away).
Final step, make a new event page with that pretty little button next to the event's name. Under preconditions, select the switch you just turned on previously, and leave the rest of the event blank, as such:
Don't mind the rocket car; my original two ovals looked like a car, so I went with it.
Well, there it is: an event that goes away.