You can set an owner for an appointment in the Appointment Workflow.  The appointment owner is used to determine who owns the process for completing the verification and approval steps of the appointment.  

When creating a new appointment, the owner is automatically set to the user who is logged in.  So if you are logged into Silversheet and create a new appointment, you will be set as the appointment owner.  

You can update the owner of the appointment at anytime.  If you want to hand-off the ownership of the appointment to someone else, simply click on the pencil icon and update the owner from the dropdown and click save.