The first thing to do is block your tickets (this implies no financial commitment). This can be done through travel agents. Make sure the Travel Agent is good and you get the best possible deal.
Block flights with many airlines/agencies. Put pressure on the agencies and get as much info as possible. Much before the flight call the airlines themselves and confirm your ticket (from India British Airways and AIR FRANCE offers the best package.Indicate whether you want Asian Vegetarian Meal (AVM), non-smoking section, etc […]