“I’m not comfortable with that.”

why use it? This is a good enough reason to object to anything because comfort is everything. And people won’t inquire why it’s not comfortable, they’ll respect your choice. You don’t have to defend it.

Source: Scott Ginsberg, aka “That Guy with the Nametag,” networking expert and author

“I’m glad you researched this; it’s going to make my job easier.”

when to use it: When a customer says, “I saw it on the internet for less.”
why? It’s a compliment and re-establishes your ground as the expert. Use this opening to explain why your prices might be higher because of your expertise, reputation, trustworthiness … (we trust you know).

‘I wish we could do that …’

when to use it: With a customer who is trying to negotiate a better price or one who is asking for an unreasonable allowance for an error.

why? Instead of creating an adversarial scenario, these words actually compliment a customer for his intelligence. Do they always work? No. But they work frequently enough to remember. — Rick Segel, Retail Business for Dummies