1. Please.
When you ask something using "please" people really feel generous and you get the desired results.
In the above case Santa is telling please not boy so he didn't got what he wanted but if boy had used please he would have definitely got it......
2.Sorry
If u commit a mistake and fail to say a sorry than opposition will get hurt resulting in failure of relationships.
3.ThankYou
After receiving any compliments if we say thankyou than it always benefits the one saying thankyou
Thanking you for reading
Sorry if i made a mistake
Please regret my bad english