You can now have your Exchange Online mailbox setting up for you new events based on emails you receive, which could be either flights or hotel reservations, live events like concert or package delivery.
To manage the automatic event creation based on emails, you need to go to your mailbox settings (https://outlook.office.com/owa/) and turn on/off the feature and options.
NOTE this feature is turned on by default
Click the Gear menu (on the left of your account picture) and choose Calendar below the Your app settings section
Then go to Automatic processing\Events from email to define how you want to the feature