I am asking for more time to pay back my restitution. How can I write this

"RE: case no. ____

Dear Judge ____:

I have been ordered to make restitution of $___, by ____. For the following reasons, despite my best efforts, I am unable to pay this amount by that date:
[explain your circumstances making it impossible to pay.]
May I please have more time?

Sincerely,

Joyce Rey
[address & phone number]"