Video Conference Platform, meeting scheduling tool

one user (h)would detect suitable time of meeting and meeting duration, while another user(r) would book the nearest available meeting , then both would have video communication for limited time, user (r )would make payment to use the platform or have to get confirmation code by user (m) "you could check this link it contains: _videos here would describe wireframes for each user, _video that describes mind map intro to help you understand mind maps _mind maps would describe workflow and screens' components for each user, _you would find a mind map that contains needed duties and preferred technologies and tools [login to view URL]"