answer: Miao Ping helps Mr. Trent to close his account because Mr. Trent is going back to London.
documents: #Person1#: Hello, Mr. Trent. What can I do for you this afternoon?
  #Person2#: Actually, Miao Ping, I'm here to close my account with you. I'm going home, the company is transferring me back to London.
  #Person1#: Oh, I see. When are you leaving?
  #Person2#: Next week, so I thought it was better to get this all sorted out as soon as possible.
  #Person1#: Yes, of course. Well, let's get started. Would you show me your passport, please?
  #Person2#: Here you are, Miao Ping. Don't laugh at the horrible photo today, OK?