Maybe it's an Indian thing but I generally end most of my emails with "Awaiting your reply..." and sure enough I always get a reply. I guess when you end with that, it makes it clear that I'm waiting for the other person to reply to me. We also write "please do the needful" and "please advise" a lot in our emails too :/
I don't know why but 'please do the needful' really gets under my skin. It feels very demanding for some reason.
The phrase “do the needful” is never utter without an undertone of “you fucked up, please fix your fuckup immediately”. The funny part was that none of the Indian folks who used this phrase frequently would cop to it. Strong denials all around. But every example we could find in our email, that tone was certainly there.
Take from that what you will.