Ultimately I would try to resolve the issue on my own if possible. For instance, there was one time when I was working on a flight and one of the other flight attendants was nowhere to be found. The other attendant I was working with was absolutely fuming, so I calmed her down and told her I would do whatever possible to find our missing colleague. It turned out she was in one of the bathrooms vomiting after coming down with serious stomach flu. I informed my other co worker of the situation, and she became a lot more reasonable. The two of us worked a little harder than usual on that flight, and we made sure the sick attendant got off when the flight landed to get medical care.