题目有两个信息点: interesting conversation 和 stranger.Interesting conversation 更容易，只要你不把 interesting 的意思限制在有趣，但是有趣的是，你应该能够拓宽你的思维。毕竟，你以前不知道的信息，你不明白的领域，你不明白的东西可以归类为有趣。第二点 stranger 的扩展更容易陷入死胡同。如果你认为的陌生人是路过街道的人，几乎不可能说话，除非它只是帮助他人或被他人帮助。想想，我们每天都跟陌生人聊天，但也许我们没有注意到，比如超市收银员，医院医生，上班接触的人，排队等候的人, 或者最常见、最有可能的出租车司机进行对话。
You should say:
Who the person is 这个人是谁？
What you talked about 讨论了什么？
What kind of person he/she is 他/她是什么样的人？
And explain why the conversation was interesting 解释为什么这次谈话很有趣？
The interesting conversation I am going to tell you happened in an Italian bank. I was travelling there and since I was running out of money, I went to the bank to cash some traveler 's checks. The exchange rate was looking healthy. But when I went to the teller, they told me the computer system was temporarily down, so they could not do any transactions. They said the problem would be fixed in a minute. So I waited.
Then I started talking to another guy in the bank. He was a tourist from China and studied in Britain. He had been here for a week, but he was moving on to Germany tomorrow. This article is from Laokaoya website. Do not copy or repost it. He was an architect and he spent four weeks travelling around Europe. He told me the names of some places where we should eat, great food and not too expensive. He also gave me this map of the bus system. He said he did not need it anymore.
The reason I find this conversation interesting is that I never expected to chat with someone in the bank. But I did and got a lot of useful information and some advice for my coming tour.