.. _Retrieve-existing-booking:

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Retrieve an existing booking
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.. raw:: html

   <h3>Workflow description</h3>

If the client knows the "OrderID" of the booking, the IATA_OrderRetrieveRQ message can be used to retrieve an existing booking.

When a booking is found in the airline's reservation system, the API will return an IATA_OrderViewRS including all booking details.

.. raw:: html

   <h3>Message Flow</h3>

.. image:: ../images/Retrieve_existing_booking.png