pub.client:http response


I have a requirement where i need to invoke another flow service using http invoke.
In my parent service A i am calling another flow service B using pub.clinet:http. I am able to succesfully pass IS document as input to B. by mapping it to data --> args field.

However i am not able to find the way to get back response either in xml string or IS document.

I will really appreciate if you guys can guide me through the solution or any document reference which can give me an idea about how to proceed.

Please reffer the Built-in Services guide for pub.client:http. The output parameters are described there.