Dear .........,
How are you? Thank you for your wonderful gift. I think you got an enjoyable summer holiday. And I would to tell you about my last summer holiday. 
I spent my summer holiday with my family in Da Nang for 3 days. That was really great days for me. On the first day, we had a trip to Ba Na Hills. The atmosphere was very fresh, it made me feel good. We visited many places such as Fantasy Park, Debay Cellar, French Village, etc.
On the second day, we went to visit My Son Sanctuary and go swimming in the afternoon. Da Nang beach is very pure and the scene is really beautiful. So I took many nice pictures.
And on the last day, we just walked around the town, enjoy some delicious dishes of Da Nang such as bun Quang, banh trang thit heo, etc and bought some souvenirs. I have a great gift for you. I will send your gift and the beautiful pictures that I took for you.
I really had a great time with my family. Da Nang is a wonderful place and people in here are friendly. I think this is a place I shall never forget. So how is your summer vacation? Write to me and tell me about it.
I'm looking forward to hearing from you soon.
Best wishes,