You will be able to edit your desk bookings to change the date and time.

Navigate to My Bookings by clicking on your profile name on the upper right. The highlighted number next to your profile name indicates the number of your upcoming reservations. Then, choose My Bookings.

The My Bookings dialog displays.

Click the Edit  icon to edit your booking's date and time.

When you have finished adjusting the booking, click the UPDATE button.

The My Bookings dialog displays the new date and time for your booking.