You shouldn't cancel plans with people.
Steven has some plans with his friend Mandy for this weekend.
Steven is not feeling like going, and wants to do something else.
Steven tells Mandy he'd like to do something else that weekend instead of the original plan.
Steven tells Mandy he's going to have to cancel on her.
Mandy is all for it, excited that Steven is giving back to the friendship.
Mandy gets annoyed at being told such short notice.