Sandeep Kattar practices [FORMALY JOHN SMITH]When we meet Kaira aka Koko (Alia Bhatt) in Dear Zindagi first, she is working. On a set. Looking at the world through a lens, constructing pretty images. We know, from her smile, and from the appreciative comments of her co-workers, that she is good at what she does.To have a female lead presented as possessing a profession from the get-go, and excelling at it, still feel like a significant step for a Bollywood movie. And to have Kaira declare to a current love that she has had a fling with another feels nothing short of a revolution.