Dear [Name]:

I hope this letter finds you in good health and high spirits. I am writing to express my heartfelt gratitude for the lovely gift you gave me. Upon receiving your gift, I was filled with joy and gratitude. It was truly a thoughtful and kind gesture on your part.
Your generosity and thoughtfulness have touched me deeply. I was thrilled to receive such a beautiful and useful gift. Your thoughtfulness will always be treasured by me. I remember opening the box and seeing the gift and my face lit up with a smile. The gift is absolutely amazing and I will cherish it always.
It is amazing how sometimes people we least expect to surprise us with heartfelt gestures; you have touched me deeply by your kindness. Your kind and thoughtful gesture has left a lasting impression on me. I sincerely appreciate the effort that you put into selecting the perfect gift for me.
Once again, I want to express my gratitude to you for your kindness and generosity. Your gift means a lot to me and I will always cherish it.
Thank you again for the wonderful gift, and for being such a generous and caring friend. I am indeed lucky to have you in my life.
Warm Regards,
[Your Name]