I was asked to work this morning by my on-car. As I am pulling out of the building to head to the airport a casual driver pulls in and asks me where I am going. It turns out he was also asked to work this morning. I could have played the seniority card but instead let him work as he didn't get his 40 hours this week. My question is this--am I entitled to the four hour minimum as I was asked by management to work this morning or did I forfeit that when I let the junior employee work?