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how to reply an official letter asking you to become one of the speaker on their conference
we agree with the topics they suggested
my reply consists of:
- agree to become the speaker
- the presentation materials will be send later

please help me checking this reply letter

Ms. AAA

I thank you for your proposal on Tuesday, 22 January 2004 for joining BBB Conference as the speaker.
I will be happy to participate on the event with topic “CCC”.
We will soon send you the presentation materials.

Thank you for your kind attention.

Yours sincerely

DDD
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My try:
AnonymousDear Ms. AAA,

Firstly, I want to tender my thanks to you for your proposal on Tuesday, 22 January 2004 for inviting me as a speaker at BBB Conference.I really appreciate to participate on the event with topic “CCC”. The presentation materials will be sent to you later.
Thank you for your kind attention.
Yours sincerely,
DDD
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Dear Mrs A,

Thank you for your invitation to take part in the BBB conference being held at [location, town] on [dates], and to speak on the topic of "xxxx".

I would like to accept this invitation, and will be pleased to give a presentation on "xxxx". Materials relating to this presentation will be forwarded to you by [date].

Please let me know if there is any particular requirement for the format of these materials.

Yours sincerely,

xxxx
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