curl --request POST \
  --url https://ota-int.axisdata.net:9443/hotelavailability \
  --header 'Content-Type: application/xml' \
  --data '<OTA_HotelAvailRQ xmlns="http://www.opentravel.org/OTA/2003/05" MaxResponses="200" EchoToken="1" Version="2008.1">
  <POS>
    <Source>
      <RequestorID Instance="MF002" ID_Context="AxisData" ID="TEST" Type="22"/>
    </Source>
    <Source>
      <RequestorID Type="88" ID="TEST" MessagePassword="testpass"/>
    </Source>
  </POS>
  <AvailRequestSegments>
    <AvailRequestSegment InfoSource="12">
      <StayDateRange End="2029-07-24" Start="2029-07-17"/>
      <RoomStayCandidates>
        <RoomStayCandidate>
          <GuestCounts>
            <GuestCount Count="2" AgeQualifyingCode="10"/>
          </GuestCounts>
        </RoomStayCandidate>
      </RoomStayCandidates>
      <HotelSearchCriteria>
        <Criterion>
          <RefPoint CodeContext="Country">Spain</RefPoint>
          <RefPoint CodeContext="Region">Mallorca</RefPoint>
        </Criterion>
      </HotelSearchCriteria>
    </AvailRequestSegment>
  </AvailRequestSegments>
</OTA_HotelAvailRQ>'

"<string>"