E-mail to a teacher

Hi mr. Iza
I'm writing you to say that unfortunately, I'm not going to be able to attend to the lesson planned for tomorrow morning, because I have scheduled my third-time driving lesson and I really can't miss it or else I'll have to take the driving course again.
I'm really sorry for thyis, I was hoping that perhaps you could change the day of the lesson or at least let me take it some othe time with a different course, I'd really appreciate it.

I'm looking forward to your soon response.

Best wishes,

Gabriel