My entry to #Jokechallenge - a challenge meant to make us laugh!

Kudos to @gabriel.ncl for the good job doing. And a big thanks you to @the-future for your support,
Here is my entry

A tourist asks a man in uniform, "Are you a policeman?"
"No, I am an undercover detective."
"So why are you in uniform?"
"Today is my day off." Hahahahhahaha