Dear (insert friend's name),
I hope you are having a wonderful day! I just wanted to write to you about my recent trip to Paris, even though it would've been much nicer with you. The food in Paris is very delicious, and my favorite was the crossiant. I also saw the famous Eiffiel Tower, and took some pictures with it. It was very big and beautiful! I hope to see you soon!
Sincerly,
(insert your name)