answer: #Person2# wants to exchange the money to some US dollars in the bank. #Person1# offers guidance.
documents: #Person1#: May I help you?
  #Person2#: Yes. Do you exchange foreign money here?
  #Person1#: Yes. Our bank is authorized to deal with foreign exchange.
  #Person2#: What kinds of currency do you change?
  #Person1#: We can change only three kinds of currency, USD, Japanese Yen and HK Dollar in our savings office.
  #Person2#: Could you tell me what the exchange rate for USD is today?
  #Person1#: The buying rate is 826. 44 yuan for 100 dollars.
  #Person2#: I want to change some Us dollars to cover my expense here.
  #Person1#: Please go to Counter No. 2, the foreign exchange counter. It's over there.
  #Person2#: Thank you.