✔ 最佳答案
Are you sick or simething else? Anyway, The 1st thing is what do you think? Do you want to have BBQ or Karaoke or even go out with Jack.
If you want you can say
Dear Jack,
I am fine. Thanks. Go out dueing hoilday is a great ideal! I like you suggestion. However, which day do you suggest? or Whom you want to invite? Becasue I think more people can get more fun, right. Please call me if you have time.
Best Rgds
Matthew.
If you don't want to go with him or due to sick.
Dear Jack,
I am fine. Thanks. However, due to doctor's recommandation, I am not avaible during hoilday. I have to take rest in the bed,
Best Rgds
Mattew