PB Booking Joomla Extension modification

Howdy Developers! On my Joomla site I'm using PB Booking Component to handle online reservations and bookings: [login to view URL] But I have a problem with it, that I can not solve. I set the trading hours from 14.00 PM to 18.00 PM every Wednesday: [login to view URL] In this case the clients can choose which time they want to arrive. Since we do not have too many clients so far, most of the cases the bookings are very far from each other in time, like: 14:00 and 17:40 and nothing happens in between. Thats why I would like to modify this view, so the PBBooking only shows the next AVAILABLE time for booking for the clients. 1. So if theres no booking on a specific day, it shows 14.00 PM. 2. The first client comes and takes this time. 3. When the next client visits the site he/she can reserve from 14:20 (because we have 20 min consultation sessions), so she/he makes her/his booking for this session and so on. I hope that you understand my issue. Developers wanted who knows this component or can help me to modify the component accodding to my needs.