Thanks guys for your suggestions. My wife spoke with Cathay and they said that porter can be arranged in LAX. She just need to tell the air-hostess / airline staff on arrival and they can arrange it. But unfortunately they can't arrange the porter in Mumbai. So half of the problem is solved, half still remains.. Chetan ..will PM you.
While googling for this came across this link.. may be useful for someone
http://www.tasla.org/meet&greet.htm Rohan.