Book an appointment the same day

Hi,
I have seen in your plug-in that the appointment can be done only the day before when there is the appointment.
I would like to make the possible until 1 minute before possible to book a service in my place.
This happen because my customer are alredy in my structure (I am inside a big mall), so limiting booking at one day before make difficult to make saloon my only plug-in to use to handle all my customer.
Thanks for the great app and continue this way!
(Also thanks for the last update that has increased the value of customer at the same moment from 20 to 100)