Tourist

We went to an ancient museum today. We saw tourist a group of tourists who came from Canada. They had an American accent.
We made an appointment for to speak in via Skype. One of them had written an article about authority of people.

Good job Saeed.  Don't forget that capiltalization is important in English, as it helps with the flow of reading.  Sentences must start with a capital letter (e.g. We went...) and proper nouns are capitalized (e.g. Canada).

In regards to your sentence, "They had an American accent.", as a Canadian, I beg to differ.  Some Canadians may speak English with an accent that is similar to the accent of some Americans, but it would not be exactly the same.  As well, there are regional differences in pronunciation across both Canada and the States - for example, people from New England speak with a different accent than those from the Southern US.  When people refer to an "American accent", I'm not sure which accent they mean. Sale no mobarak!  (^_^)