answer: Mary wants to go to the ladies' room, so #Person1# gives her a hall pass to avoid trouble.
documents: #Person1#: Do you have a question, Mary?
  #Person2#: No. That's not why I raised my hand. I need to go to the ladies'room.
  #Person1#: Let me give you a hall pass for it.
  #Person2#: What's a hall pass?
  #Person1#: With a hall pass, you can go to the ladies'room or wherever you need to go during class time.
  #Person2#: I see.
  #Person1#: If a teacher stops you in the hallway, just show him or her the pass.
  #Person2#: Or else I'll get into trouble.
  #Person1#: That's right.