Improved appointment bookings

Could there be a cut off for booking appointments. My other system allows me to set the number of days before an appointment that it can be booked (its very nice for planning, so I know when I have privates for the next 2 days and I know it won't change). So for instance, my clients can not book an appointment for tomorrow anymore because it is too late. It also has a setting for how far in advanced they can book. I am able to set mine to as many days as Id like. I like to keep mine to 45 days so people don't go on and book their preferred time all at once for the year. This way they will have to go back in and book appointments and others will have a chance at those times the next time.