I am writing this to express my deep gratitude for your contribution to my thesis and to my DBA program. I can do nothing to repay you adequately for your contribution to my education. I promise to always cherish your lessons and, I hope, inspire others as much as you ever have for me.
There is nothing that I can do or say to repay for your contribution as a professor. I hope to cherish all the beautiful memories, and keep in touch with you wherever I move in my career.
Thank you very much,
E.F., DBA student