英语问题----关于请假

Ask for Leave

XXX:
I wanna leave and go back to school for handling some inportant issues,including taking part in the final examination and amending my disquisition... I am waiting for your approval
Thank you~

your sincerely,你的名字

I would like to ask a few days off to go back to my school (university) to resolve some issues, such as attending my graduation exams and correcting my thesis.