Félicitations pour service rendu (professionnel) (2)

Dear [Mr or Mrs or Sirs], I wanted to tell you how pleased I was to have worked with you on [affaire]. You have always handled the situation the best way and were a great help to us. We thank you for everything you have done and intend to contact you when we organize another [événement]. Yours sincerely [votre nom] [votre fonction]