C: (slowly) Have you got any Limburger?
O: No.
C: Figures. Predictable, really I suppose. It was an act of purest optimism to have posed the question in the first place....... Tell me:
O: Yessir?
C: (deliberately) Have you in fact got any cheese here at all?
O: Yes,sir.
C: Really?
(pause)
O: No. Not really, sir.
C: You haven’t.
O: Nosir. Not a scrap. I was deliberately wasting your time,sir.
C: Well I’m sorry, but I’m going to have to shoot you.
O: Right-0, sir.
(The customer takes out a gun and shoots the shopkeeper)
C: What a senseless waste of human life.
http://www.montypython.net/scripts/cheese.php
This is my favorite excerpt from the sketch:
C: It’s not much of a cheese shop, is it?
O: Finest in the district sir!
C: (annoyed) Explain the logic underlying that conclusion, please.
O: Well, it’s so clean, sir!
C: It’s certainly uncontaminated by cheese.