Plugin customization

Hello,

Great plugin!
I would like to ask is it possible to customize this plugin to make it that the user will be able to book the time in another user time slot.
Etc.: there are users list and time slots and me as a user could press and book time to chat with user X at 12:15pm. It’s like a possibility to reserve time slot to get in touch with another user? And after booking was made, in the schedule it is marked as booked.

https://wordpress.org/plugins/rendez-vous/