They will ask for your flight information. That's more important for the trip back to the airport, as they'll assign you a departure time that's about 3 hours before your flight.
When you're going from the airport to the resort, there aren't any scheduled bus times that I'm aware of. Buses come and go continuously, so you don't have to worry about missing your bus. Just make your way to the ME area, and they'll direct you for the bus line for your resort.