The words are not coming out of my lips but it has come out at the bottom of my heart to convey my sincere thanks and to appreciate their team work for the following points.

I am writing this email to place on record our sincere appreciation and thanks to you and all your team members who facilitated the session and activities on the 1st of Feb 2020 at NALS Campus. All of thoroughly enjoyed the experience

I must thank you, on behalf of all my colleagues, for the memorable experience all of us had at NALS.