Should I go into details by stating the date and the place for the meeting that have been changed in my reply?

Question

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Dear Sir,

With reference to your letter dated November 1, 2006 regarding the change of date and place for the Second Meeting of the ADF, we herewith confirm our attendance of the Meeting.

Answer 1

I would re-state it. You don't want any misunderstanding. I would say something like this:

Dear Mr. Smith:

Thank you for your letter regarding the change of time and place of our November 1 meeting. I look forward to meeting with you again at your office at 3:00 p.m. If there is anything I need to bring, please feel free to call me at [phone].

Sincerely,
(your full name)

Or some such...

Answer 2

I don't think it is necessary, but it wouldn't hurt if you want to.