It was my distinct pleasure to serve you and should there ever be a need for my services again it would be my pleasure to help.
As promised I will be mailing you [gift giveaway] in the mail and you should be receiving it over the next few days.
I can see from your responses that it appears that your experience was not exactly up to par to what I like to see.
If you do not mind I would like to contact you sometime over the next day or two to see if I can get to the bottom of your issue and what I can do to make it right.
Thank you again, [Business Owner]