Track the Responses
The Recipient's responses are recorded in the Appointment. Let's look at the Tracking.

Before You Begin: Return to the Calendar
Go to the Navigation Pane->Calendar.

8. Try It: Find the Appointment
The Calendar is opened.
Go to a date: January 22, 2013.
Double Click the "New Project"
The appointment should open.

What Do You See? There are three tabs, now:
Appointment
Scheduling Assistant
Tracking

Try This, Too: Review the Tracking
Go to Tracking. The Tracking shows the Name of each Recipient and their Response.

Click on Save (the blue disk icon.)
This Appointment should close.

Done and Done.

Appointment->Tracking