Dear Professor Doe:
    I attended your seminar at Taiwan Trade yesterday on the subject of organization planning, and am writing to express my sincere appreciation. Because of your excellent talk, I was able, for the first time, to understand the need for clear lines of organization, delegation of responsibility, and individual authority to exercise assigned duties. I am sure that what I learned from your talk will prove to be invaluable in my future work and will help me do my work more efficiently.
    I thank you once again for coming to our company and hope I may have the pleasure of attending another one of your seminars in the future.
    Sincerely yours,
    Jack Chen
    Director, Personnel Dept., Taiwan Trade