ممكن طلب اجازه بدون راتب بالانجليزي….
u could just write that u would like a vacation without salary
hope u get it 
thanks any way
Request for Unpaid Leave of Absence
Date:
To: HR Department / or GM Office
I (your name), request an unpaid leave of absence to begin from ____________ and to end on ____________ for the following reason (mention your reason).
Thank you in advance,
Sincerely yours,
Your name
Your name
bless u all