Assertion: 1st class's seat | /r/HasProperty | available
Facets:
Source sentences:
text: All seats can be reserved from 30–90 days before travel date until minutes before departure time when seats are still available.
text: If you’re trying to get an upgrade to first class, check in at an airport kiosk a few hours early to see if better seats are still available, and try asking for an upgrade at a reduced price if they are.