answer: Du Juan phones the hotel operator to complain about the consistent failure to get through to the booking office. #Person1# apologizes and will ask them to call Du Juan when the line is free.
documents: #Person1#: The hotel operator. Anything I can do for you?
  #Person2#: I've been trying to get through to the booking office for the last ten minutes. But the line has been engaged all the time. Why is it taking so long?
  #Person1#: I'm sorry to hear that. I'm afraid it is often the case during the peak hours. Shall I ask them to call you when the line is free?
  #Person2#: OK. Please do so if it is not troublesome.
  #Person1#: No trouble at all. May I know your name and room number?
  #Person2#: I'm Du Juan, in Room 312.
  #Person1#: I see. Wait in the room, please.
  #Person2#: Thank you for your kindness.