Choose the right word to fill the gaps.

At the airport
A lot of people ... by planes or jets. First of all, you need to buy a ticket and pay airfare. Airfare is the cost of the plane ticket. You ... between economy class, the lowest class of travelling, and first-class, the class with better seating and more services. You go to the check-in desk to pass check-in. Here are some questions. A check-in officer may ask you:
"Show your passport, please." / "Can I see your passport?"
Passport is an official document that ... personal citizenship.
"Would you like an aisle seat or a window seat?"
"Do you have baggage to check-in?" Baggage or luggage is bags or suitcases you have.
"Do you have any hand luggage?" Hand luggage / Carry-on/ Cabin luggage is bags that passengers ... on the plane.
"Do you have anything to declare?"
When you get a boarding pass-ticket that ... you to board the plane, you are asked to ... through a metal detector to check you don’t have illegal items. After that, the passengers go to the departure lounge and ... for their flight. At international airports, you can enjoy duty-free shopping.
Departure time is the time planes ... the airports. Here are some airports announcements:
"Please, proceed to gate number 5." Gate is the place where passengers wait to board the plane.
"Please, do not leave your bags unattended."
"Flight departed."
"Flight is now boarding."
"Flight has been delayed."
"Flight has been cancelled."
The aircrew includes pilots and flight attendants, people who ... of passengers on the plane.