A: This visit is over for me. Here's your room key.
B: Thank you for that, and in return, here's your receipt.
A: And thanks to you.
B: I hope you'll visit us again, sir.
A: I'd be willing to try this hotel again, if you can promise me no more cockroaches.
B: I guarantee you that our little “friends” won't be back. I hope your trip home is pleasant.