Dear LIly,
I'm sorry to tell you that I’ve lost your new dictionary. Now I’m expressing my deepest apology for my carelessness.
Actually, I put the dictionary in my schoolbag after we met in McDonald’s yesterday. But to my sorrow, it was stolen on my way home. I tried to get it back but failed. How angry and guilty I felt!
This morning, I went to buy the same dictionary in some bookstores but ts very expensive. However, I promise that I'll tighten my belt these days to get you a completely new one by the end of this month. Please forgive me again and accept my sincere apology.
Best wishes!
Yours,
**