Dear Tom,
Thank you for your letter. I'm happy to hear that your summer holidays will start soon! As for me, my summer holidays usually start in June. It's always a great time!
I often travel in summer. Last year I visited my grandparents in the countryside. This summer I am planning to go to the seaside with my family. I am really excited about it! What about you?
I hope you will have a wonderful summer. Write back soon!
Best wishes, [Your Name]