['one time i got to work and my manager said where have you been , i didnt think much of it i said in bed relaxing , shes like your late 3 hours i guess i wrote my squedule wrong, it felt so bad']
Hey, honest mistake. Obviously you didn't come up with some dumb lie and make it seem like they made the mistake and not you. You owned up to it. I'm sure they appreciate that more than you would figure.
i got super late to work