We should very much like to take this opportunity of thanking you for a job so very well done. It has been a pleasure for us to have you working here and for all attention to detail you have shown. Nothing has been too much trouble for you and you have always deal with our questions or thoughts so thoroughly. Thank you also for your help at 4b that was such a relief for us with everything else going on.
Should you need to reassure a prospective customer that you do exactly what you say you will do and at the agreed price, then we should be more than happy to obligate,
Our very best wishes to you all!