.. _Change-one-ancillary-on-an-existing-booking:

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Change one ancillary on an existing booking
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.. raw:: html

   <h3>Workflow description</h3>

This workflow is used to change one ancillary on an existing booking.

It is a combination of the workflows :ref:`Add-ancillaries-to-existing-booking` and :ref:`Delete-items-from-an-existing-booking`.

Due to the limitation of the IATA_OrderReshopRQ to request specific services, in this workflow only IATA_OrderChangeRQ is supported.

This means, that for the deletion of item, IATA_OrderChangeRQ is used in this workflow.

This means also, that the restriction of the IATA_OrderChangeRQ is taking effect, that only one item can be deleted at a time.

Therefore this workflow can only be used to change one ancillary item at a time.

.. raw:: html

   <h3>Message Flow</h3>

.. image:: ../images/Update_booking_add_ancillaries.png

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   <h3>IATA_OrderReshopRQ or IATA_OrderChangeRQ?</h3>

In this workflow, only IATA_OrderChangeRQ is supported due to the ancillary related limitations.