vacation letter

guys please help me to add some statement?
correct me also if im wrong.
thank you...

SUBJECT: VACATION LETTER

Dear Sir,

I, __________________ (37304) working in Civil Department as a Key Unit
Technician. I`m grateful for the opportunity to work for your company and I enjoy doing so.
I hope you will agree that in the past 2 years I`ve worked for you. I`ve become an integral
Member of your team and accomplished many company goals. In line with this,
I want to request from your good office to grant me an urgent vacation this month of September because of some important reasons.

I do not have any colleague/authority to handle in my absence.

Thank you and hoping for a positive response regarding with my request.