Pick a character from a current work-in-progress, a past story you’ve written or one you’ve thought up but never used.  Stick this character in an airport, bus station, train station, space dock or other transportation hub where they are awaiting their departure time.  Now cancel their flight/train/bus/etc.  Describe in the comments here where they were going, how they felt about going there and how they react to this change in their travel arrangements.