I want to ask my instructor for a letter of recommendation, I will be done with my AA degree by the end of this semester and want to apply for 4 year...

I want to ask my instructor for a letter of recommendation, I will be done with my AA degree by the end of this semester and want to apply for 4 year universities in order to complete my BA. what should I write to him or her?

pleeeeeeeease help

Thank you