Letter For Service Hours Completed How Do I Write A Formal Letter, Requesting To Complete My Community Service Hours At My Old Elementary School?

How do I write a formal letter, requesting to complete my Community Service hours at my old elementary school? - letter for service hours completed

I wanted to grade 7, if I can, add to and even exceed my hours of community service at my old school. Now I am in grade 9, and requested the Head of the Secretariat, of which you need to volunteer. She said she would write a letter to the Deputy Director of things, such as the level of service that I want for what I have to be willing to OD, what hours I had available to volunteers, and contact information. I know there must be an official letter, of course, but in what format? How do I write? Thank you!