When Rosie Perez tells Woody Harrelson she's thirsty, her problem is lack of empathy for her by Woody not lack of liquids in her body. By getting up and mechanically fetching her a glass of water, Woody only amplified the problem and a quarrel ensued.
The Rosie Perez story is something worth remembering in relationships with your female friends but also when interacting with your customers. When a customer tells you about her problems, she foremost expects you to understand her and only secondary to come up with solutions. If you're pushing your solution without making an effort to understand what problems your customer really has, a disconnect will necessarily ensue, as it did between Rosie and Woody later in the scene of the White man can't jump movie.