answer: Tom comes to find Miss Gray because Lisa got angry and didn't want to be his deskmate anymore. Miss Gray will talk with her later.
documents: #Person1#: Good morning, Miss Gray, could I talk with you for a moment?
  #Person2#: Yes, Tom, come in. What's the matter?
  #Person1#: I want to change my deskmate.
  #Person2#: Why? Don't you get on quite well with Lisa these days?
  #Person1#: Yes, but actually it is she who wanted to change the deskmate. She said she didn't want to be my friend anymore.
  #Person2#: Oh, why? Can you tell me the reason?
  #Person1#: Yesterday, she wanted to borrow a pen from me, but accidentally I didn't have an extra 1 to lend her, so she got angry with me and didn't want to be my deskmate anymore.
  #Person2#: OK, Tom, it is not so serious actually. Later I will talk with Lisa. I'm sure she will understand you. Now it is time for the math class. Let's go. Oh, by the way, can you help Miss Cook hand out the grated English homework?
  #Person1#: Sure. Thank you, miss Gray.