dialogue: #Person1#: Good coming. What can I do for you?
  #Person2#: I'm in Room 309. I'm checking out today. Can I have my bill now?
  #Person1#: Certainly. Please wait a moment. Here you are.
  #Person2#: Thanks. Wait... What's this? The 30 dollar for?
  #Person1#: Excuse me... The charge for your laundry service on Nov. 20th.
  #Person2#: But I did't take any laundry service during my stay here. I think you have added someone else's.
  #Person1#: Ummmm...Sorry, would you mind waiting a moment? We check it with the department concerned.
  #Person2#: No. As long as we get this straightened out.
  #Person1#: I'm very sorry. There has been a mistake. We'll correct the bill. Please take a look.
  #Person2#: Okay, here you are.
  #Person1#: Goodbye.
summary: #Person2# finds #Person2# being mischarged. #Person1# corrects the bill and #Person2# pays for it.
topic: check out