"There was a time when one of my fellow flight attendants snapped at a passenger. This was during the first half hour of the flight, and it he had just started work, so I knew he wasn't just tired. The first chance I got, I invited him to have a coffee with me at the galley. I treated it like a friendly chat and asked him what's going on with him, anything interesting, things to just get the conversation to open up. Soon, I found out that he was having personal problems, so I just became a good listener for him.
I steered the conversation back towards work and talked about positive things to get my coworker back into a good mood. Then I mentioned that there was a passenger who seemed to be upset about something. I suggested that my coworker see if there's anything the passenger needed. That way, the passenger would have contact with my coworker again, and this time it'd be a positive interaction. As you can see, I'm very good at influencing people in a positive way."