Parameter in the Shopping Exchange flow (ATPCO path).

If set to ''true'', the original booking code will be kept for the unchanged flight.

<TPA_Extensions>
  <Flight Type="A" Number="445" DepartureDateTime="2021-02-20T13:00:00" ArrivalDateTime="2021-02-20T14:35:00" Shopped="false" ClassOfService="M" KeepBookingCode="true" Flown="false">
    <OriginLocation LocationCode="SYD"/>
    <DestinationLocation LocationCode="MEL"/>
    <Airline Operating="QF" Marketing="QF"/>
    <Reservation Status="OK" RealStatus="HK"/>
    <BookingDateTime>2020-12-03T07:53:00</BookingDateTime>
  </Flight>
  <SegmentType Code="O"/>
  <AlternateTime/>
  <CabinPref/>
</TPA_Extensions>