I need help to help a friend

Can eny one help me find my friends family in New Orleans. Im looking for her unkel, named Bjørn Dahl. He emigrated from Norway just after world war 2. He was married to Hazel and they got 6 kids, John, Solveig, Charlotte, Charles, Linda and Michelle. I want to help my friend with this because she has two sisters here in Norway and thats all . You dont have to do all the work for me, you can send me links or teach me howto do this. This is my first post I just became a member. You can reach me by mail [email hidden] Wish you a great day Per Vidar