Non-flight

It was a perfect morning for a balloon ride, and our daughter's family was up by 5:30 and ready to go.......
The problem?
The balloon company never called them to tell them the flight was on.
Fearing they would miss their flight, we all drove to the field where they were supposed to depart.
No one there!!!
As of 10 a.m. we still don't know why the flight was cancelled....it was really a shame because it was absolutely perfect weather!!