Where did the hotel attendant change rooms and didn't check out?

It can be said: I hope you will allow me to make sure that you haven't left anything in the room. A moment, please.

If you don't lose anything when you come back, just say that all your things are here. Welcome to stay in our hotel next time.

If you lose something, just ask politely.

In fact, when a guest checks out, the general hotel will inform the waiter to check out directly, and generally will not say hello to the guest. In some hotels, when guests leave, the waiter will check the room quickly. I think it's better this way.