听力原文：Woman: If you have to deal with a customer who keeps ringing your office about a problem you think you've already dealt with, it's important to be forceful. Make them understand that you really sympathise with their problem, but decide on a course of action early in the conversation and try to keep it moving quickly to avoid any difficult areas. If you can, it might be worth your while trying to discover if there is another reason for their persistence, to try to do something about it before they call again. You turn on the radio and hear a woman giving advice to business people. What advice does she give about dealing with customers?