The service is first launching on United Airlines' domestic flights, although Google hasn't shared a timeline for the rollout yet. Assistant will also be able to retrieve and save your boarding pass, and proactively remind you to check into your flight when it's ready. You don't have to install separate airline apps to get these features, either.
To simplify even more aspects of travel, the Assistant can also book you a hotel room via Choice Hotels, AccorHotels, InterContinental Hotels Group, Priceline, Expedia, Mirai and Travelclick. You can also keep your itinerary, restaurant shortlists and group expense notes under Assistant's purview, as it's getting support for Google Keep, Any.do, Bring! and Todoist.
Google does plan to spread these features to other airlines and hotel booking services in future, although it didn't share when it expects to do that. For now, only those who frequently fly domestically via United Airlines will be able to experience the convenience of having Assistant handle most of the hassle of travel. The rest of us will just have to wait and see.