Before the flight.
It is the terminal of the international airport. Passengers are arriving and departing. Airplanes are landing and taking off. Passengers are going upstairs and downstairs. They use escalator or elevator. The arriving passengers are leaving the terminal building. They are going out and taking seats in buses, in cars and taxis. Some passengers are going by service shuttle buses. They are hurrying because of connecting flights.
At the airport.
When preparing to fly, passengers usually arrive at the airport 2 hours before departure time. They must register their tickets, get a seat, and weigh and check their luggage. Most airlines have at least 2 classes of travel, business class and economy class. Business class tickets are more expensive. Each passenger more than 2 years old gets a free luggage allowance. This weight is usually 20 kilograms of checked baggage for economy class passengers and 30 kilograms for business class passengers. If you have excess luggage you will pay a fee calculated by the number of extra pieces and the extra weight. Every passenger is also allowed one small carry-on bag, small suitcase and laptop computer.