How to set limit of avaliable tickets for event for one day.
I am creating websites with boat tours. Each day we have two tours. One in the mornig second in the evening. For each we can take only 18 passangers. How can I set up limit for tickets. Now I can only limit bookings. But on each booking I can reserve as much tickest as I want, but it should be as much as is avliable.