Which conversation is more formal?()

A、This is to inform. you that your book has been rejected by our publishing company as it was not up to the required standard. In case you would like us to reconsider it, we would suggest that you go over it and make some necessary changes.
B、You know that book I wrote？ Well, the publishing company rejected it. They thought it was awful. But hey, I did the best I could, and I think it was great. I？m not gonna redo it the way they said I should.