Re: Vacancy for [position title]
Thank you for attending your recent interview for the position of [position title].
I very much enjoyed meeting you to discuss the role. I have now had the opportunity to consider all of the candidates against the criteria we have specified for the job. The decision has been a difficult one, as the overall standard of candidates was high. After careful consideration I regret to inform you that on this occasion we have decided not to progress your application any further.
Thank you for your interest in [Company name]. I wish you every success in your future career.
[Name of signee]