Hello Sambaran,
you have to XML structures and need to map one from the other. This is very basic PI functionality. Where is your problem? If you don't know which field to map where, ask the functional colleague (although the mapping looks very obvious to me, even field names are exactly the same). If you don't know how to do the mapping, ask someone who knows PI. This would be so basic knowledge that you better acquire it in some SAP course or some internal training.
Regards,
Jörg