Dear Professor, ( Usually we would address our professors with Dr. and the last name) I hope you are doing well. ( I am not sure what you want to say here but... ) In response to your email I would like to confirm that this is my email address. I would like to say that it is an honor to be one of your students. You are a great, experienced and professional professor. (This sounds a little bit like flattery, so be careful it is not taken the wrong way.) I hope to do my best in your course, Best Regards