感谢的英文(1.告诉对方不能接受你的邀请2.对对方的邀请表示感谢3.说明无法接受邀请的原因，写一篇英语文章)

Dear Sir/Madam：Let !downYour birthday of time I am on business to train a study still in Guangxi, can't accept your invitation.The loyal appreciates your invitation!Is really embarrassed, I want to ask for leave to come back to attend your birthday party, but superior different idea, I make again after only coming back late come of wish:Your happy birthday!Wish your happy birthday!Lee 婧婧Expensive sun