Pun-ishment

Okay, so I'm working at the gates with a co-worker, when some guy comes up with a question. My co-worker sees his boarding pass and notices that his name is unusual. "It's a Czech name," the guy says.

They continue whatever their business is, and my co-worker asks if the guy only has carry-on luggage.

"Yes, it's a carry-on," the guy says, "but it's also a Czech bag!"

What can you do? I laughed and gave the guy a drink voucher.