写一篇简短的英语拒绝邀请信.
问题描述：
写一篇简短的英语拒绝邀请信.
具体的内容是m先生在圣诞节举办了一个派对要请你参加,但是你在那天正好要加班不能去,请委婉的表达出你对m先生邀请的感谢和你不能参加的原因,并表示遗憾.100字左右
答
Mr.MI'm terribly sorry that I cannot able to attend your party held on christmas day,because on that day i have to work overtime and so many affairs to deal with,and i don't know what time i can leave...