请教英文高手,我该如何回复领导的邮件?英文的,谢谢!!

给领导发了个邮件,邀请他参加一活动,他回复因另有安排不能参加,我该如何回复,领导的邮件如下:

I regret that I have other engagement on that day.

Have a nice day for all the participants.

第1个回答  2012-08-06
Dear***,
Thank you for your response.What a pity that you can't join us.Hope you can join us next time.I will bring your kind regards to all the participants.
Best regards.
第2个回答  2012-08-06
Dear XXX,
It's a pity wiyhout you in this party. I will bring your kind regard to all participants.本回答被提问者采纳
第3个回答  2012-08-06
What a shame that you can not keep your appointment with us!