Store: We don't have X. Care to sub?
Me: How about X2?
S: No. We don't have any of that brand.
Me: Do you have Y?
S: No, out of that too.
eventually we end up at
OWNER: (brightly) Of course, sir. It's a cheese shop, sir. We've got--
SCOUT: No no... don't tell me. I'm keen to guess.