An invisible man is here to see you
Nurse: Doctor, there is an invisible man in your waiting room.

Doctor: Tell him I can't see him now. Next.

A man went to the police station wishing to speak...
A man went to the police station wishing to speak with the burglar who had broken into his house the night before. "You'll get your chance in court," said the desk sergeant. "No, no, no!" said the man. "I want to know how he got into the house without waking my wife. I've been trying to do that for years!"