Dear …
Once again, thank you for allowing __ (company name) __ the opportunity to be of service to you. I just wanted to express to you how much we appreciate your business.
It is our privilege to be your __ (type of product/service) __ provider and we thank you for once again choosing __ (name of company) __. Your continued business is testament to our commitment in placing customers first at our company and we look forward to being your __ (type service provider/type product supplier/financial advisor/etc.)__of choice, for many years to come.
I ask that you feel free to contact me directly anytime with any questions or special needs that you may have. We offer a full range of __ (type of products/services) __ and I would welcome the opportunity to discuss with you how your needs can best be met.
Sincerely,