Lettre-type - Demande de renseignements

Dear [Mr or Mrs or Sirs], [Société] is dealing with [domaine] and is constantly seeking to improve its services to its customers. Therefore, we would be must obliged to you if you accepted to complete the attached questionnaire and return it to us at your best convenience in the enclosed stamped and addressed envelope. Studying your answers will help us to further our aim. If you wish to have any information about the form, please do not hesitate to contact us. Thanking you for your assistance, we look forward to hearing from you. Yours sincerely [votre nom] [votre fonction]