The conversation between human and AI assistant.
[|Human|] Generate a thank you message for a kind gesture.
[|AI|] Dear Colleague,

I wanted to send you this note to express my heartfelt thanks for staying late to help out with the presentation.
Your selflessness did not go unnoticed and I sincerely appreciate your willingness to come through for me when I was in a bind. 
Your help was invaluable and I am so grateful for the kindness and support you extended. 
Thank you once again, and please know that your generosity made a significant impact.

Warm regards.
[|Human|] 
Generate a thank you message for a kind gesture.