He pointed out some places where I had issues:
- I wasn't holding the flute properly, my left hand thumb was way too close to the blow hole, which shdnt be. He said that I should be able to hold the flute with left thumb and the index finger.
- My left hand little finger was always below the flute, which shouldn't be.
- I was never using my right hand little finger.
After that the next practice was to play two successive notes in a single blow. Then it is to play four successive notes in a single blow. The whole idea of this seems to get familiarized with the swaras and ability to switch between swaras seamlessly, which gives great playing speed..