answer: Mr. Ma asks the operator to make a call to Australia but the operator says he can call directly and the special rate applies between 6 pm to 8 am. Mr. Ma asks the operator to charge the call to his room.
documents: #Person1#: Operator.
  #Person2#: Hello. I'd like to make a call to Australia.
  #Person1#: You can call direct if you like.
  #Person2#: Oh, can I?
  #Person1#: Yes, please.
  #Person2#: Could you please tell me the international prefix and the country code for Australia?
  #Person1#: Yes, the code for Australia is 61 and then dial the city code and the number. Start with the international code which is 00.
  #Person2#: What time do the special rates apply?
  #Person1#: Between six in the evening and eight in the morning, sir.
  #Person2#: I wonder if I can charge this call to my hotel room.
  #Person1#: Certainly. Tell me the room number and your name, please?
  #Person2#: This is Mr. Ma in room 215.
  #Person1#: OK, Mr. Ma. I'll tell the front desk clerk the charge afterwards.
  #Person2#: Thanks very much for your help.
  #Person1#: You're welcome. Bye.
  #Person2#: Bye.