39. Hello, is that Mary, Mary Jones？
40. Hello, this is John Hall. Is Mr.Li in？
41.May I speak to Ms. Green, please？
42. May I ask who is calling, please？
43. Would you like to leave a message？
44. Can I take a message？
45.Operator, please put me through to the manager's office.
46. Ok, just a minute.
47. Please call 341-5581 extension 624 to contact me.
48. Hold on, please. （pause） I'm sorry. He's not in his office.
49. Sorry, Sir, the line is engaged. Could you try again later？