A Small Blue Case

mr. hall:I left a suitcase on the train to London the other day.
attendant:Can you describe it, sir?
mr. hall:It's a small blue case and it's got a zip. There's a label on the handle with my name and address on it.
attendant:Is this case yours?
mr. hall:No, that's not mine.
attendant:What about this one? This one's got a label.
mr. hall:Let me see it.
attendant:What's your name and address?
mr. hall:David Hall, 83, Bridge Street.
attendant:That's right. D. N. Hall, 83, Bridge Street.
attendant:Three pounds fifty pence, please.
mr. hall:Here you are.
attendant:Thank you.
mr. hall:Hey!
attendant:What's the matter?
mr. hall:This case doesn't belong to me! You've given me the wrong case!