I really enjoyed your speech at the (event). I know there was a lot of thought and preparation that went into the event and your speech demonstrated that preparation. I'm anxious to take the ideas you presented and apply them to my daily life. Thank you for providing...
Dear (recipient's name),
I really enjoyed your speech at the (event). I know there was a lot of thought and preparation that went into the event and your speech demonstrated that preparation. I'm anxious to take the ideas you presented and apply them to my daily life. Thank you for providing such worthwhile information.
Sincerely,
(your name)