CHLD child over 2 and under 12 years old =
EXST extra seat
GPST Group seat request
INF Booking contains an infant
INFT Infant accompanying adult passenger
NSSA Non Smoking Aisle Seat (Not Valid on UA)
NSSB Non Smoking Bulkhead Seat (Not Valid on UA)
NSST Non Smoking Seat (Not Valid on UA)
NSSW Non Smoking Window Seat (Not Valid on UA)
PETC Pet in Cabin (Must Fit Under Seat)
SEAT Kennel in cabin
SLPR Bed/Berth in cabin
SMED Passenger has medical condition
SMSA Smoking aisle seat
SMSB Smoking Bulkhead Seat (Not Valid on UA)
SMSQ
SMST Smoking Seat (Not Valid on UA)
UMNR unaccompanied minor