Last week when I was out shopping, I saw a middle-...

Last week when I was out shopping, I saw a middle-aged Western woman in a store downtown. In Chinese, she was trying to ask a storekeeper if he sold a certain kind of chair. However, she didn’t know much Chinese and her pronunciation was quite poor, so the storekeeper didn’t understand her. She seemed to be getting more and more frustrated, so I went over and asked in English if I could help, but she just ignored me and kept trying to explain things to the storekeeper herself. The storekeeper still didn’t understand her, so I asked again if I could translate for her. This time she looked at me and said she didn’t need my help. She also said that if I wanted to practice English I should go to an English corner. Then she turned around and left the store. She sounded annoyed and didn’t look very happy, so I didn’t follow her to try again. Why was she so rude and unfairly？ Did I do something wrong by asking if I could help her？ Don’t Westerners ever accept help from other people ？