You'll be charged for advance seat assignment or meal service for the roughly six - hour flight. (dannydealguru.com)
This ticket comes with priority check in and boarding so you get settled in sooner, as well as advanced seat assignment. (thetravelmagazine.net)
The dreaded basic economy fares offered by the airlines have many restrictions including the lack of advanced seat assignments, no upgrades or priority boarding and other limitations such as no cancellations or refunds. (rewardexpert.com)