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. Would you please tell me what kind of audio-visual equipment youll need. If you could let me know your specific requirements by [date], Ill 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]
Thank you for your letter of [date].
Im glad that you are also going to [place] next month. It would be a great pleasure to meet you at the[exhibition/trade fair]. Our company is having a reception at [hotel] on the evening of [date] and I would be very pleased if you could attend.
I look forward to hearing from you soon.
Yours sincerely, [name] [title]
[organization] would very much like to have someone from your company speak at our conference on [topic].
As you may be aware, the mission of our association is to promote . Many of our members are interested in the achievements your company has made in .