This feature can be located on the GNet dashboard under "Reservations". You can view the recent reservations on this screen, up to 10 reservations per page with some basic information such as requester/provider, pickup date, and status. A screenshot is included below, for additional details on each ride you can click on that specific reservation and you can find more details.  

If you are looking for a specific reservation you can enter the reservation number in the search field on the upper right corner.