Do you think these sentences are good English and the format make sense?

Question

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Dear Mr. X

Thank you for your e-mail. I would like to ask for your kind help to issue a visa assistance letter for visa process and issuance during my stay in Malaysia :

From 2 October to 5 November 2007 for the x Meeting

and

From 18 November to 25 November to attend the Fourth X Meeting

Please find below my passport details.

Answer 1

This draft appears to be a little archaic in its construction. (I dont mean any offence, please.)
Maybe you could try this version:
Dear Mr. X,
Thank you for your e mail dated....
I would greatly appreciate if you could help me with a visa assistance letter to facilitate my getting a Malaysian Visa. As you may be aware, I propose to be in Malaysia between 2nd October and 5th November for the x meeting, and again between 18th November and 25th November for the Fourth x meeting.
I have given below my passport details.
Thank you.

Answer 2

You're doing pretty well. I might make a few minor adjustments. This message should be sufficient assuming the individual has all the information necessary to write your letter. If not, you may wish to include additional information in the second paragraph about the nature of the letter and its contents.

Dear Mr. X:

Thank you for your e-mail. (You may wish to remind the person of the contents and date of the email if you think s/he may have forgotten). I would like to request your assistance in obtaining a letter to help process my visa for my stay in Malaysia where I will attend to two X meetings. The First X meeting begins on 2 October and continues through 5 November 2007. The Fourth X meeting takes places from 18 November through 25 November 2007.

I sincerely appreciate any assistance you can provide and look forward to hearing from you. My passport details follow.

Sincerely,

Your Name
Your Contact Information

Answer 3

In my opinion, I don't like it. You should write it in business letter formant.

intro [dear...]

1st paragrah [1-2 sentences explaining why you're writing the person]

2nd paragraph [no more than 3 sentences explaining exactly what it is you need]

3rd paragraph [1-2 sent. thanking the person for reading the letter]

sincerely,
....