Answer:
Dear ____,
I hope your doing well! and I hope you had a great vacation! Sadly I couldn't go on my dream vacation, because I had to get my grades up but I would love to tell you about where I wanted to go.
my dream place to go would be the Maldives! oh such a beautiful place and I wish that my grades were good enough that I could go but I couldn't, maybe next year but anyways, feeling the sand in my toes would be great and I could play volleyball and I could have an amazing view and it would be a great vacation but I'm sad I couldn't go. (You can add more things about the Maldives)
Anyways, I hope you enjoyed your vacation to Dubai! I have to go now,
your best friend,
____________