Modèle de lettre-type (anglais) - Relance pour non réponse (2)

Dear [Mr or Mrs or Sirs], We have sent you a questionnaire on [date] and asked you if you would be kind enough to return it to us with your answers. As we have not received it back, we take the liberty to remind you about this matter and we enclose another copy of this questionnaire. We are very keen to know your opinions about the products of [entreprise] because it will enable us to improve our services to you. Therefore, we thank you very much to take our request into consideration and return the completed questionnaire at your earliest convenience. If you wish to have any information about the form, please do not hesitate to contact us. We look forward to receiving your answers. Yours sincerely [votre nom] [votre fonction]