Need help quick on how to quit my job in a nice way?

okay so i work a a park and when it rain basically you dont get paid or come in be cause we work out side with sports and recently i only worked 5 days since i started n its been a full mth without me coming in and i reall want to start a new job but i have no idea what to say i want to call them and tell them i dont want to say i quit i need nicer words can some one plz help