I missed a shift and it was my fault. I would like to apologise and take measures so it doesn't happen again. I work seasonal at a large chain of retail stores. I take the work extremely seriously (even though many people don't) and would like to get hired full time and transition to the head office. There is a policy where 3 no shows is cause for immediate termination and today was my first.
Today a manager called asking why I hadn't shown up for work. I told her I didn't know I was supposed to and she said another manager had told me. This other manager usually sends me text messages for shifts, so I checked these and found he hadn't for today. So I texted him that I didn't have a record of a shift today and confirmed the other dates were correct.
Embarrassingly, I just found the piece of paper the manager handed me when I was working on till. It had today's date written down.
I plan on apologising to both the manager who called and the one that gave me the shift. Anything in particular I should say, or just "sorry, my fault?"
Another complicating factor, is when the manager called me today she called from a private number and she said "where were you?" so I answered literally. I said I was sick and at the doctor, which was true. That being said, since I want the work and wasn't too sick I may have not bothered to call in sick and shown up, but since I had been under the impression I wasn't working today anyway I hadn't given the decision thought. Should I bring any of this up?