Your still not thinking through exactly how things need to work, why would you need to provide passengers with a flight time after they have made the booking, the system would provide this when the booking is made.
You need to sit down and think about exactly what the clerk would do when taking the booking and what the system would need to do in order to facilitate this.
You need to sit down and think about exactly what the clerk would do when taking the booking and what the system would need to do in order to facilitate this.