Monty Python pt 9

Mr. Vibrating: Come in.
Man: Um, is this the right room for an argument?
Mr. Vibrating: I've told you once.
Man: No you haven't.
Mr. Vibrating: Yes I have.
Man: When?
Mr. Vibrating: Just now.
Man: No you didn't.
Mr. Vibrating: I did.
Man: Didn't.
Mr. Vibrating: Did.
Man: Didn't.
Mr. Vibrating: I'm telling you I did.
Man: You did not.
Mr. Vibrating: Oh I'm sorry, just one moment. Is this a five minute argument or the full half hour?
Man: Oh, just the five minutes.
Mr. Vibrating: Ah, thank you. Anyway I did.
Man: You most certainly did not.
Mr. Vibrating: Look, let's get this thing quite clear. I most definitely told you.