answer: #Person2# has no extra key so #Person2# will send somebody to help open #Person1#'s door.
documents: #Person1#: I can't get into my room. I mean I left my room key inside.
  #Person2#: I see, sir. Those two ladies in front of your room did the same thing twenty minutes ago.
  #Person1#: Oh, did they? Well, would you give us an extra key to the room?
  #Person2#: I am afraid we have no extra key. So I will send somebody to your room.
  #Person1#: By the way, what should I do with the key when I go out?
  #Person2#: Please drop it at the front desk when you leave the hotel.