Once it finds one of these instances it saves a reminder with the subject, persons involved and possible deadline. The result is, as seen in the picture and video, a surprise reminder that will present you with the part of the email that triggered the feature as well as who the commitment was made to, ie. the recipient of the email.
Microsoft's Cortana assistant might not be the most popular of the voice assistants but it is definitely challenging the competition in terms of machine learning. Google's new Google Assistant is also heavily focused in machine learning and context specificity.
The update comes available first on Windows 10 in the U.S. followed by iOS and Android updates in the coming weeks.