Service Selection not working properly

When my customers select a different service other than the default service they have to click "Show available times" button in order for the calendar to register the selection. I need it to automatically change without them clicking show available times as this is too confusing for a normal user.

All services are on the same schedule so there is no need for this separation. Please help.

In short I need to get rid of the show available times button and when they select a service from drop down and pick a date it shows up on the confirmation without that button.