here, courtesy of pisceskitty.
Associate will be A. Customer will be C.
A: What was your address?
C: (insert street name) apartment 123 H...
A: H as in Ham?
C: No...H as in Harry.
A: *confused* Ham and Harry both start with H.
C: No they don't!
In particular, lordlucan's quote.
It's true. Harry starts with an H, ham starts with a pig.