Display only empty time slot in meteor fullcalendar


What I want to do is to display only the empty time slot of every day to the visitors; so, they can choose one time slot and book it. from yesterday I’m working on it but I can’t figure out how to do it.

Also, I saw all related questions on here and stackoverflow but nothing helping.

Any one has an idea or an example will be great ??

Thank’s for your help.