帮我完成以下英语对话
问题描述：
帮我完成以下英语对话
1.-----_______________________
-----My birthday party is going to begin at three o'clock in the afternoon
2.----I'll see you on Saturday afternoon at 5:00 at my flat
-----Thanks.________________then
3.------I'm sorry I didn't go to the concert last night
--------_________________The concert was wonderful
答
-when is your birthday party going to begin
-See you
-What a pity!