Communication Problems is my favourite by far, especially after dealing lately with people who underestimate the degree of their hearing issues.
Mrs. Richards: I asked for a room with a bath.
Basil Fawlty: [indicating] You've got a bath!
Mrs. Richards: I am not paying seven pounds, twenty pence per night, plus VAT, for a room without a bath.
Basil Fawlty: There is your bath!
Mrs. Richards: [looking at it] You call that a bath? That's not big enough to drown a mouse. It's disgraceful.
Basil Fawlty: I wish you were a mouse.
Mrs. Richards: What? And another thing. I asked for a room with a view. When I pay for a view, I expect something more interesting than that.
Basil Fawlty: [going to window, indicating] That is Torquay, ma'am.
Mrs. Richards: That is not good enough.
Basil Fawlty: Well, may I ask what you were expecting to see out of a Torquay hotel bedroom window? Sydney Opera House, perhaps? The Hanging Gardens of Babylon? Herds of wildebeasts swinging majestically...
Quote courtesy of: the internet.