"I thought your service was excellent and the number of responses we received were in excess of what we were expecting. Amongst the applicants there were four that on paper appeared to be a good fit for us however after interview, three moved to the next stage.
I want to thank you very much for your professionalism, your enthusiasm and genuine interest in our organisation. You took the time to listen to what our needs were and scoped the advertising campaign to suit our individual requirements. You made regular follow up contact and revisited us each week. I will most certainly recommend you to other organisations, and I will email you their details.
Once again thank you for a great job.