Bali Murali,
You're getting some Euro-centric responses here and they will not help you if you want to work as a 'flight' dispatcher in the M.East. There is no 'work your way up' route here.
The reason that route is common in some European countries, UK in particular, is because they have not yet embraced the licenced flight dispatcher concept and have no choice. Many airlines, Easyjet included, send their aspiring flight dispatchers for flight dispatcher training. The training is relevant and standardised and gives an excellent foundation on which to build. Learning bits and pieces as you go, from lots of different people is not a good way to learn things.
Sheffield is the best when it comes to training. The Dispatcher factory in DXB is overpriced and taking advantage of the fact that many people in that region cannot afford or are not allowed to go all the way to USA. They are also responsible for flooding the M.East with inexperienced newbies who will work for the lowest bidder.
I could never figure out why they are issuing GCAA licences yet go heavy on the FAA regs, not the regs of their licencing authority. Makes no sense to me.
Good luck with whatever you choose.
D.O.G