Eric Fraterman has listed quite a few customer service quotes. Below are those that appealed to me –

• Quality in a service or product is not what you put into it.It is what the client or customer gets out of it. -PETER DRUCKER
• If we don’t take care of our customers, someone else will. -UNKNOWN
• Our life is frittered away by detail. Simplify, simplify!HENRY DAVID THOREAU
• Being on par in terms of price and quality only gets you into the game. Service wins the game. -TONY ALESSANDRA
• Our greatest asset is the customer! Treat each customer as if they are the only one! -LAURICE LEITAO
• People expect good service but few are willing to give it. -ROBERT GATELY
• Well done is better than well said. -BENJAMIN FRANKLIN
• To my customer:I may not have the answer, but I’ll find it.I may not have the time, but I’ll make it. -UNKNOWN
• In business you get what you want by giving other people what they want. -ALICE MACDOUGALL
• You’ll never have a product or price advantage again. They can be easily duplicated, but a strong customer service culture can’t be copied. -JERRY FRITZ

Source: http://customerfocusconsult.blogspot.com/2007/09/customer-service-quotes-for-inspiration.html