Ignore people who tell you 'you can't' or try to discourage you.
Biggest question: Isn't it really 'customer helping' rather than customer service? And wouldn't you deliver better service if you thought of it that way?
If you look deep inside trust, you'll find truth.
Friendly makes sales - and friendly generates repeat business.
In sales, it's not what you say; it's how they perceive what you say.
Testimonials are the BEST way to beat down the price objection and win the sale.