Explain the 21th century practice of airline ticketing and reservation

Reservation and ticket agents are employed by airlines, bus companies, railroads, and cruise lines to help customers in several ways. ... They determine whether seating is available, answer customer inquiries, check baggage, and direct passengers to proper places for boarding.

Explanation:

i think this

I think a lot of thinks happened

Explanation:

Because I tried searching it but it didn't show so I think a lot of things

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Forever-Roxanne M.