Dear Joey,
I'm writng to warning you about your performance.
First, As today we have new staff come to join with us and we did tell you since Aug 8,16., but your shop staffs didn't know about this. Please be responsible your duties and be a good role model to staffs.
Second, Following shop schedule, you work today. But Management team haven't recieved any messages or call from you.
We hope to see your improvment.
Thanks. Sorry about that