基本按照您的要求写的：
June24,2008
Dear Mr&Mrs Green：
Thank you so much for your hospitality and kindness last month. It was very kind of you to put me up at your house while I was in America. I reallygrateful for your taking me around delicious. Surely I had a unforgettable time in Newyork . I hope I can repay you in the same way in Tianjin some time in the future.
Best Wishes,
Zhang Lei