(Ezra 7:27) Why does this letter switch to the first person?

So far, in the book of Ezra, the book has been in the third person. Here, it switches to the third. This is probably the case because Ezra (the author) enters the story at this point. Much like the “we” passages of Luke, Ezra writes from the first person, because he is directly involved at this point in the narrative (where he hadn’t been before).