Modèle de lettre-type (anglais) - Relance d'un client perdu

Dear [Mr or Mrs or Sirs], We have noted that we have not heard from you since now four years and thought that you would be interested by recent changes that have occurred at [société]. We now propose to our customer [new products, payment facilities, etc.]. We trust that this enlarged range of products should give your customers entire satisfaction. We always pay great attention to our customers' demand and would like to know if you have been dissatisfied with us in any way. Please do not hesitate to contact us and we will do our best to remedy the matter to give you complete satisfaction. We look forward to hearing from you. Yours sincerely [votre nom] [votre fonction]