补全对话,（选择适当的话语使对话意思完整。）
A: hello! May I speak to Jack please？
B: This is Jack speaking。 ________
A:This is Sam. I called you last night, but there was no reply.
B:       I bought something for my  trip to Guangzhou.
A: Guangzhou?  That’s where the 16th Asian Games was held. How lucky you are!
B: So I am.  ________
A: I’ll have a birthday party next Thursday. Would you like to come?
B: I’d love to, but I’m afraid I can’t come!  
A: What a pity that you can’t come!     
B: Thank you very much. Bye!
A: Bye!