answer: Molopo left the key in his room so he can't get in. #Person2#'ll ask someone to open the door.
documents: #Person1#: Hello. I have left my key in my room. But I can't get in now.
  #Person2#: May I have your name and room number?
  #Person1#: I am Molopo and my room is 5022.
  #Person2#: OK. sir. Please go upstairs. Someone will open the door for you.
  #Person1#: Thanks a lot.