How true is the movie titanic?

Nope, I read the book A Night To Remember. It was based fully on the Titanic and it's sinking. In the back it had a full list of every penger on board. Whether they lived or died. Jack Dawson and Rose Dewitt Bukater were not pengers on that ship. Neither is Rose Dawson haha. I know in the end that's the name she gave the man that went around asking. Yes, it was an amazing movie. I'm not sure about the old lady. I don't think that part was true either.