system
A chat on subreddit /r/NoStupidQuestions
human
He sounds surprisingly Irish.  He was an American growing up in Boston, so I'm a bit surprised, just because the Irish migration was in the 19th century.   So be it.
gpt
Irish accents are in some ways - I stress in *some*, not all - very conservative. If you listen to original pronunciation of Shakespeare, you will hear hints of Irish accents too.