Viết bài chấp nhận hoặc từ chối lời mời sau

Viết bài chấp nhận hoặc từ chối lời mời này giúp mình với:
Minh invites you to his dinner this Sunday. Write a reply letter accepting or refusing his invitation.

Dear ……,
We have not met each other for a long time. How is everything? My brother has just got back from Ho Chi Minh City. Would you like to come to dinner with us this Sunday? Kien and Phuong will be there, too.
Why don’t we spend some time together?
Your friend,
Minh