根据对话语境，在每个空白处填入一个适当的句子，使对话完整通顺。
A: Hello! 1_____________________________?
B: Just a moment … I'm sorry. Bob has gone out. Who is that, please?
A: Oh, this is Paul. 2_____________________________?
B: He will be back at about 7 o'clock.
A: 3_____________________________?
B: Certainly. I'm glad to do that.
A: Could you ask him to call me tomorrow afternoon?
4_____________________________.
B: 3-7-4-6-5-9-8. All right. I'll tell him as soon as he comes back.
A: 5_____________________________.
B: You're welcome. Bye!
