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:

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the compromise of 1850 was a package of five separate bills passed by the united states congress in september 1850, which defused a four-year political confrontation between slave and free states on the status of territories acquired during the mexican–american war