write an appplication to the principle for leave to attend the

write an appplication to the principle for leave to attend the 
marriage of your brother.
The principle
A.B.C school
Quetta

R/Sir,
most respectfully I beg to say that i have to attend the marriage
of my elder brother.Therefore, it will not be possible for me to attend
the school.
I request you to grant me leave for a week i-e dec21 to 27.
Thanking you,
Yours fathfully,
X.Y.Z
Class 9th.
Date:dec 21,2013