A pilot may file a (flight plan).Logical formLearned from71 sentences. (Flight details) may pertain-to a person.Logical formLearned from71 sentences. Flights can be low-altitude.Logical formLearned from71 sentences. Safety may pertain-to a flight.Logical formLearned from71 sentences. A flight can be secret.Logical formLearned from71 sentences. A flight can be into space.Logical formLearned from71 sentences. Flights can be between a US-city.Logical formLearned from71 sentences. A flight can be comfortable.Logical formLearned from70 sentences. (Charter flights) can be international.Logical formLearned from70 sentences. A commercial flight can be scheduled.Logical formLearned from70 sentences. A (return flight) may pertain-to a female.Logical formLearned from70 sentences. Flights can be across a country.Logical formLearned from70 sentences. A cost may pertain-to flights.Logical formLearned from70 sentences. Flights may undergo a resumption.Logical formLearned from70 sentences. Flight can be to quality.Logical formLearned from70 sentences.