Reservations Limits, 2 spots per time slots

We are making a reservation form for renting/reserving picnic pavilions at our facility.  Each day, we have three time slots available, and only 2 spots for each time slot (we have 2 pavilions). How do we limit it, so when a reservation is made, that spot is no longer available?

This can be achieved with gift registry widget but the downside is that you will have to increase the limit every day to allow new sets of entry.

Here are the widgets: 

https://widgets.jotform.com/widget/gift_registry

This is also a similar widget https://widgets.jotform.com/widget/quantity_gift_registry but this allows multiple quantities.

Demo: https://form.jotform.com/92176618473970

So if the time slots are all selected today, just increase 2 to 4 to allow another 2 spots in the following day.