A : why are you so sad, B?
B : im hungry but i lost my wallet this morning
A : poor you B, where was the last time you see your wallet?
B : i saw my wallet for the last time in the canteen this morning, A
A : i will help you to find your wallet now you can use my money to buy something in canteen
B : thanks A, you are my bestfriend
A : no its okay