you can easily invite or select the visits in pax for an online booking page, for this go to advance booking page click on the link and select the service 

after that select the staff or can select anyone

then select the date and time slot and number of PAX for visit then enter the details like name, contact number and email address and submit it

After booking, you will get a confirmation message on the screen as well on your phone number and email id. Also, these online bookings will be displayed in the Calendar as well