Dear Mr. / Ms :
I am very glad that you have accepted our invitation to speak at the meeting in City on X X, 20xx.
As we agreed, we'll talk about it." From x hours to x hours. We have a few minutes for questions.
Could you tell me what kind of audio-visual equipment you need? I need to. If you can let me know your specific requirements before X, X, 20xx, I will have enough time to ensure that the hotel provides you with what you need.
Thank you again for agreeing to speak. I'm looking forward to hearing you.
Sincerely yours,
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