Not a liberry story, but a good one about the lack of customer service:
Last week my dad went to a department store to buy a pair of Dockers. He was the first one in the door when it opened, and a friendly employee said hi, can I help you? My dad said sure, I'm looking for men's Dockers.
They went around and around in figure eights looking for the pants. My dad said they walked about a mile. Finally he said, don't worry, I'll find it myself. She said I'm not really familiar with the men's department.
Then don't say can I help you unless you mean it! Like, hi, how are you?