PPLLLSSSS HEEELLLPPPPP MEEEE!!! I NEEEDDDDD HELP!

ciao guys! i may b one of those people who really don't get time on the internet much.... hee hee!
but i REALLY need some advice.
u c, i want to add this person on Skype. I can do that, but HOW DO I cancella PEOPLE FROM SKYPE??
i no this may seem pathetic, but i had to ask!
pls help me out n tell me how to cancella pple on skype!