How to limit date reservations?

hello ... while setting up the booking form.... if one person as selected a particular time in a given day... how to limit that the next person who takes the same time , should not be able to select the same time ??

We have some widgets that you can try, I would suggest you trying with the MultiSelect Grid widget: https://widgets.jotform.com/app/multiselect_grid 

Here is how to add a widget: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-Your-Form 

There are also other widgets you may consider:

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

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

Let us know if you need more help.