answer: #Person1# applies for a library card and pays the deposit. #Person2# tells #Person1# refund is available as long as the card is well kept.
documents: #Person1#: Good morning, madam. I'd like to apply for a library card. Can you help me?
  #Person2#: Yes. Please give me your ID card, a photo.
  #Person1#: OK. Here you are.
  #Person2#: Then you have to give me 15 dollars for the deposit. The library card is free.
  #Person1#: OK. Here is the money. And If I return the card, can I get the refund?
  #Person2#: Of course, as long as the card is well kept.
  #Person1#: OK. I see. Thank you.
  #Person2#: You are welcome.