For each enrollment request message, a health insurance carrier's web service always returns a response message acknowledgement the receipt of the enrollment request. If there are problems…

For each enrollment request message, a health insurance carrier's web service always returns a response message acknowledgement the receipt of the enrollment request. If there are problems fulfilling the requested enrollment, the web service may respond at a later time with an additional response message detailing why the enrollment could not be fulfilled. Which Oracle SOA Suite service component should be used to implement this integration pattern?