Hello, Mr XXX. In recent days, with your help and guidance, my graduation thesis on xxxx has been preliminarily completed. Now I send my graduation thesis to you. I hope you can put forward some suggestions and guidance to see what needs to be improved. I wish you success in your work and good health.

? Your student XXX

? X, x, x, x, there are telephone and other contact information.

Use honorific words, but you should be modest. You owe him nothing, and he owes you nothing. You are studying, he is working, just be normal.