I was pleasantly surprised when Cortana detected my flights (going and return) through my email, and asked me if i wanted her to track them. Ofcourse I said yes. I was expecting Cortana to give me flight updates on the day of my flight. Nope. Cortana showed that my flight was early and gave me amazing amounts of info. But one day before. And didn't show anything on flight day. I live in India though, so I expect these things to be buggy. Anyone else experienced the same in the US? I'll update this post with my experience of the return flight.
