Urgent Resignation Email: Please help me make it sound better/more formal

[immahdis]

could you please help me with my email to make it more formal? I am always awful at formal emails, and this one is very very important. Here is what I’ve written:

Dear Mr. XXXXXX,

My apologies for notifying you by email. Further to my conversation with Mr. XXXXX this morning, and his offer for a new position at XXXX, please accept this email message as notification that I am leaving my current position at the airport due to recent issues, and personal reasons. So I’d like to ask for a whole week off, effective from November 14, until November 21.
Thank you for your understanding of my decision to leave, and all your support over the past 9 months. I wish you all the best for your continued success.

Respectfully,
(My name)

[Tarheel]

It looks good to me.