So, imagine you are going on a trip and you want some adventure, so you book yourself on Air Tesla. Now, Air Tesla, being a disrupter, does not take reservations or have a fixed schedule. Instead, when you get to the airport, you tell the agent at check-in your destination (config) and they tell you to wait in the waiting area. Eventually they call your name and give you a boarding pass to on the next plane to that destination. If you change your mind about your destination, they will try to rebook you on the next flight to the new destination. If that plane had empty seats, then no problem. If that plane is full, then you have to wait for the next plane, which could be a while, but you will get priority over the folks still in line who have not gotten a boarding pass yet.