<OrderItem>
<OfferItemID Owner="BA">Offer1</OfferItemID>
<OfferItemType>
<DetailedFlightItem>
<OriginDestination>
<Flight>
<Departure>
<AirportCode>HEL</AirportCode>
<Date>2018-08-11</Date>
</Departure>
<Arrival>
<AirportCode>LHR</AirportCode>
</Arrival>
<MarketingCarrier>
<AirlineID>BA</AirlineID>
<FlightNumber>0799</FlightNumber>
</MarketingCarrier>
<ClassOfService refs="FBCODE1ADT">
<Code>N</Code>
</ClassOfService>
</Flight>
</OriginDestination>
</DetailedFlightItem>
</OfferItemType>
</OrderItem>