Abstract : Dialogue Systems are taking over the world, the trend is so strong that they will become part of our life just like Search engine did many years back. In this interactive talk we will look at this trend, what is causing this huge momentum, and what are various systems that are coming up. We will briefly also talk about some of the high level components. Bio : Puneet Agrawal is Senior Software Engineer in Bing, Microsoft where he created personality of Cortana, Microsoft's personal assistant across 13 different markets. Puneet has extensive experience working in domains of search and web relevance, natural language understanding etc. Puneet graduated from IIT Delhi (Computer Science and Engineering) in 2008 and has been ever since working with the Bing team. He holds 2 patents from USPTO and has 3 more pending approvals from patent office, all on web search related fields. Puneet has been working on Cortana digital assistant for the past 3 years and has built and shipped multiple dialogue experiences. As part of this he has practical experience with building multi-modal input systems for different kinds of form factors like phones, desktops, tablets etc. He has worked in associated areas like Conversation Understanding for a longer period of time.