I would like to extend our heartfelt gratitude to you for taking the time to participate in my survey. 

Your valuable insights and feedback are immensely appreciated, and they will play a crucial role in helping me improve products and services to better meet your needs. 

As a token of my appreciation, I am delighted to present you with a special gift. It's a small way for me to say thank you for your thoughts. 

Thank you once again,