Problem: The man was supposed to go to the seaside with friends, but Mary asked him to go help her to move out according to a short notice because she has to move out by tomorrow. Solutions: Solution 1: Find someone to replace him. But it might not work at this last minute. Solution 2: Cancel his appointment with his friends. But he has been planning to go for long, and later the weather will turn cold, and they can't go to the beach any more.