补全对话。根据对话语境，填入所缺的短语或者句子使对话意思完整。(5分)
A: Good morning, Sam! 
B: _________________Alice! Where are you going?
A: I want to go to the food store and buy a birthday cake for my brother.
B: ________________
A: His birthday is on January 27th.
B: _________________
A: He was born in 1997.
B: Um, it's 2012, so he is fifteen years old now. Do you want to have a birthday party for him?
A: ________________
B: Can I go to your brother’s birthday party?
A: ________________You are also his good friends. Welcome to the Party.