接受邀请函英语格式怎么写?

Dear sir/madam:
I'm delighted you have accepted our invitation to speak at the Conference in [city] on [date].
As we agreed,you'll be speaking on the topic "" from [time] to [time].There will be an additional minutes for questions.
Would you please tell me what kind of audio-visual equipment you'll need.If you could let me know your specific requirements by [date],I'll have plenty of time to make sure that the hotel provides you with what you need.
Thank you again for agreeing to speak.I look forward to hearing from you.
Sincerely yours,
[name]
[title]

在百度里直接搜就有啦···
是生日函还是参加派对的？