根据下面对话提供的情景，在每个空白处填入一个适当的句子，使其意义连贯、完整。

David: Hello, Office Center.

Susan: Hi, is that you, David? 1._____

David: Fine, thank you, and you? Susan, I'm so glad that you phoned. How is your study in London?

Susan: Everything is going on quite well. And how about your teaching?

David: OK. The students are very good. Oh, did I tell you about my trip to London?

Susan: Yes, 2._____

David: I'm leaving tomorrow afternoon at two.

Susan: 3._____

David: My flight number is BC 256 and I'll get to the Heathrow airport at four. Susan, 4._____

Susan: Oh, I'm afraid not. I have to bring my mother home from hospital at that time.

David: I see. It's all right. I can manage to find your place by myself.

Susan: Well, David, my friend Tom will go to meet you.

David: Oh, it's good. But I have never seen him before. 5._____

Susan: He looks very strong and tall. He has thick and brown hair. Well, he'll call you when you arrive.

           I'm looking forward to seeing you.

David: Thank you, Susan. I'll see you tomorrow.

Susan: See you.