title: check for Existing TimeSlot for given date to avoid Conflicts in booking
body: <p>I have Sharepoint Calendar List for booking Event now i want to check for Existing TimeSlot for given date to avoid Conflicts in booking.
  For Example lets say i have booking on 7/27/2011 10:00 AM TO 7/27/2011 11:30 AM now if user try to book event on same day with anytime in Between 10:00 AM to 11:30 AM i want to reject it.</p>