The most important customer service lesson I ever learned was on an easel pad in Randy Petersen’s office (“The House of Miles” which was located on Frequent Flyer Point in Colorado Springs) the first time I visited: “Don’t ever say no. What I can do for you is…”
In other words, it’s not enough just to listen to what a customer asks for and tell them whether it’s allowed. You must address their problem. You can’t always give them what they want, but if you understand their needs you can offer a solution that’s the best available given constraints.