根据上下文和你的实际情况把下面的对话补充完整。
A: Hello! May I speak to Tina, please?
B: Speaking. _____________________?
A: This is Bill. I called you yesterday, but you were not at home.
_____________________?
B: I went shopping yesterday. I need to buy something for my trip to Tibet.
A: Tibet? __________________？
B: Because the scenery there is really beautiful.
A: Oh, yes, It’s said that there is the most beautiful sky.
B: Yes. By the way, what do you call me for?
A: I’ll have a birthday party next Friday. __________________?
B: Oh, I’d love to, but I’m afraid I can’t. My plane will take off next Wednesday.
A: What a pity that you can’t come! __________________!
B: Thank you very much, Bye !
A: Bye!