求一篇关于邀请的英语对话

对不起啊,才看到.
A:Hi!bob.How are you?
B:I am fine,Thanks!And you?
A:Fine.What are you doing thesedays?
B:Oh!I am preparing for my birthday party nowadays.And it is really tiring.
A:Your birthday?Oh,you are to be 18 this year!
B:Yes.So I am going to have a grand celebration.Would you like to come?
A:It is my honor!when will it be held?
B:About a week later.and it is at 7 o`clock.pm.I am look forward to your coming!
A:OK!I will arrive on time .