A flight reservation is a booking made by a passenger to secure a seat on a specific flight operated by an airline. This process typically involves selecting a departure and arrival city, choosing travel dates, and providing personal information. Once the reservation is confirmed, the passenger receives a confirmation number, which is essential for check-in. Passengers can make flight reservations through various channels, including airline websites, travel agencies, and mobile apps. Payment is usually required at the time of booking, and the reservation may be subject to cancellation or change fees, depending on the airline's policies and the type of ticket purchased.