求一篇两人的英文口语对话，2至3分钟

Work in pairs. One of you acts as a Chinese business person, the other as an American who has sold you 2,000 personal computers. When the goods arrived, 12 days behind schedule, the Chinese found that there is some discrepancy in quality between what was stipulated in the contact and the actual goods. So he takes the matter up with the American.