Changes to getReservation

added the optional property data/assigned/items/guestID to the response with the 200 status

added the optional property data/assigned/items/guestName to the response with the 200 status

added the optional property data/cancellation to the response with the 200 status

added the optional property data/dateCancelled to the response with the 200 status

added the optional property data/dateCancelledUTC to the response with the 200 status

added the optional property data/guestList/additionalProperties/guestNationality to the response with the 200 status

added the optional property data/unassigned/items/guestID to the response with the 200 status

added the optional property data/unassigned/items/guestName to the response with the 200 status