Dear jack，
we will have a graduation ceremony next week.And I strongly suggest you attend.Because this is a great honor to us .
Example 2 Formal Reply ( Decline )谢绝Mr. and Mrs. George Mailer present their compliments to Mr. and Mrs. Robert, and regret that a previous engagement prevents them from accepting the kind invitation to dinner on Friday, March 26th. 17 Butter Place March 22nd
常用的英文邀请信
Dear sir/madam:
Im delighted you have accepted our invitation to speak at the Conference
in [city] on [date].
As we agreed, youll be speaking on the topic from [time] to [time]. There
will be an additional minutes for questions.