根据汉语提示写一篇100字左右的日记

It was Saturday and it was fine.I went to Xin Shiji Department Store to do some shopping.I met a foreigh visitor who wanted to buy a shirt.But the shop assistant didn't understand him.They were both worried.do I went up and helped them translate.The foreigher finally bought the shirt and they thanked.I was happy to know that my English was quite good and learning English was useful.I thought all of the shop assistant should learn daily English so that they could speak to the foreighers when they need it.