Recently I had an order with a buyer. He was one of the repeating buyers. I provided him with some programming related articles for his blog. Each order was having a package of 8 articles and he wanted me to send them one by one for checking. After I sent him the 2nd articles, he checked it with a plagiarism detector and says I have plagiarised the content. Below image is sent by the buyer.
As you can see the line highlighted with purple color(The aim of the article is to find the)was the line that he says I copied. Do you think that I need to copy that kind of sentence from somebody? I explained to him it can be a coincidence. But he was criticizing me that I copied the content and immediately wanted a cancellation. Ultimately I had to cancel the order. Do you think its fair in a case which I haven’t actually copied?