I went away once many years back (celebrated my grandparents' 50th anniversary) and it put me in proximity to another board member and we made plans to meet up on a certain day.
Everyone in my family was going to a theme park that day, and I even had bought a ticket, but was like "oh no, I'd rather hang out with my friend."
Sat there waiting all day, totally ghosted.
Same thing happened with a job prospect once. Got a call that someone was looking for help and gave me his number, called and spoke to the guy and he said he'd call me the next day to get started.
So I cancelled whatever I might have had going on, put on a suit, and waited for the call. And waited and waited, and finally called him myself and he was like "I gotta be honest, I went with someone else who actually called me first yesterday."
Unfortunately for me I'm always willing to give the other person another few minutes.