阅读下面对话，从方框内7个选项中选择5个恰当的句子完成对话。

A. When will it start? B. You can book it on our website. C. What can I do for you? D. Enjoy yourself. E. Where can I get the ticket? F. Thank you for your help. G. It's wonderful.

A: Hello, this is Renmin Opera House.  

B: Oh, hi. Do you still have tickets for the piano concert tonight?

A: One moment, please. Uh, yes, there are a few left.

B: That's great!  

A: At 7:30.

B: How long will it last?

A: It will last about two hours.

B: Sounds great. Can I book (预定) one ticket now?

A: Yes.  

B: Well, but how can I do it?

A: Just go to our website, fill in your information, choose a seat and pay online.

B: Sounds easy.  

A: At the gate at least half an hour before the show starts.

B:

A: You're welcome.