The correct answer to this open question is the following.
Here is the letter.
Dear Mr. Walker,
I just wanted to write this short letter to show my appreciation for the initiative to organize the cultural program in our residential complex. It has been one of the most fascinating ideas since I arrived at this complex.
I want to highlight the fact that this cultural program not only had entertainment purposes, but it really taught us valuable lessons. I never thought the program would give us a platform to showcase the talents and traditions of our neighbors that have different racial and ethnic backgrounds.
It was so good to learn from countries such as México, Brasil, Cánada, Japan, and Germany. So diverse and so fascinating.
I never thought these cultural exchanges through the cultural program would teach me and my family so much about how interesting is our world.
Without a doubt, activities like this make everyone come together as a real community.
Thank you very much for your efforts and keep on with the good work!
Sincerely,