Purna Virji is the Senior Manager, Global engagement at Microsoft and was a speaker at the Search Leeds conference 2018. Her presentation was titled Intelligent search and intelligent assistants: Exploring the AI-era of search and she generally spoke about how Bing and Google are using AI in search, and how SEOs and website owners can use Artificial Intelligence in search marketing. There was an interesting view on voice search that you don't really hear all the time.
If you would like to see the whole presentation, here are the slides:
Here is the full video of the Search Leeds presentation.