Place it at the end of a mistaken-identity setup, right after the wrong name appears on screen, then follow it with a Yeah Reaction Sound for a second beat before cutting to Directed by Robert B. Weide as the closing sting.
About this sound
This is a short, under-three-second phone exchange that ends with Patrick Star insisting, in a blunt and irritated voice, that he is Patrick. The deadpan certainty makes it funny, awkward and instantly recognisable, like a confident answer to the wrong question. It comes from SpongeBob SquarePants, where Patrick gives the line while answering a call.