history: i got super late to work one time i got to work and my manager said where have you been _comma_ i didnt think much of it i said in bed relaxing _comma_ shes like your late 3 hours i guess i wrote my squedule wrong_comma_ it felt so bad Hey_comma_ 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.
current: my manager laughed and said dangit man get to work , lol thanks for your input it made me smile
next: I'm glad! It's the honest truth. Everyone screws up. And I bet it will motivate you to never make that mistake again, too. So in the end, they have someone who's sharper about things. Good to hear it worked out in your favor.