根据下面对话内容，从A-E五个选项中，选出能填入空白处的最佳答案。
A. I'll be happy to take it.
B. Would you like to leave a message?
C. My phone number is 6085596.
D. May I speak to Mr Peter Brown?
E. I will put you through right now.
A: Hello! West Lake Hotel?
B: Yes, this is West Lake Hotel.
A: 1.
B: Room number, please?
A: Room 316.
B: 2.
A: All right.
B: I'm sorry. Mr Brown is out at the moment. 3.
A: Yes, I think I'll have a message for him.
B: OK. 4.
A: Would you ask Mr Brown to give me a ring later today? 5. My name's John Smith.
B: All right. No problem.