Me and my (adult ) dd are in a debate. I think it's rude to cancel plans last minute without a good reason ie medical emergency. My dd thinks I need to chill and it's ok to cancel if something comes up as long as you haven't paid for anything/already set off. So for example if I arranged a night out with a friend and they cancelled that day for anything other than illness/emergency I would be annoyed. They should let me know sooner. But my daughter says things come up and it's ok to switch things round. What do you guys think AIBU?