1.    Say you're sorry. Don’t use a “but”: So, no “I'm sorry, but . . .” 
2.    Own the mistake. It's important to show the wronged person that you're willing to take responsibility for your actions.
3.    Describe what happened. ... 
4.    Have a plan. ... 
5.    Admit you were wrong. ... 
6.    Ask for forgiveness.