Dear Dr Waterford,
As you may have heard from my French teacher, Ms. Jacqueline Redon, I would very much like to attend the Alliance Française's summer school course in Toulon this summer. Knowing how busy you are, I feel reluctant to ask you a favour. However, if you would write a short letter of recommendation, I am convinced that this would increase my chances considerably. I would really appreciate your help. Thank you.