How i write the application for my daughter to leave school for 1month & 15 days because we have to go to the back home to meets relatives?

The Principal
xyz school,
___ City

Respected Madam/Sir,
I have to go see my ailing parents at my home town. Due to the illness of my parents I will have to stayed for 45 days ( one month and 15 days) My daughter xyz  is studying in your school in class-.... It is requested that my daughter may be granted for 45 days leave. I assure that that I shall make arrangement for her study.
Thanking you,

yours faithfully

Xyz
house no. ABC
City....