Unless the service booking slot contains more than 1 day, leave all slots.
When enabled, the booking date and time are automatically allocated to the closest available date/time. The customer can change it during booking.
You can provide this service only on selected days, enable and select available weekdays, customers won’t be able to make a booking on not selected days.
Create a set of rules for weekdays, specific dates or even specific hours. Change number of appointments per slot, disable booking, add a break in the middle of the day…as always, the choice is yours.