Most reservation agents work for large hotel chains or airlines, helping people to plan trips and make reservations. They usually work in large reservation centers, answering telephone or e-mail inquiries and offering suggestions and information about travel arrangements, such as routes, schedules, rates, and types of accommodation. Reservation agents quote fares and room rates, provide travel information, and make and confirm transportation and hotel reservations. Most agents use proprietary networks to obtain, as quickly as possible, information needed to make, change, or cancel reservations for customers.

Transportation ticket agents are sometimes known as passenger service agents, passenger booking clerks, reservation clerks, airport service agents, ticket clerks, or ticket sellers. They work in airports, train, and bus stations, selling tickets, assigning seats to passengers, and checking baggage. In addition, they may answer inquiries and give directions, examine passports and visas, or check in pets. Other ticket agents, more commonly known as gate or station agents, work in airport terminals, assisting passengers boarding airplanes. These workers direct passengers to the correct boarding area, check tickets and seat assignments, make boarding announcements, and provide special assistance to young, elderly, or disabled passengers when they board or disembark.

Most travel clerks are employed by membership organizations, such as automobile clubs. These workers, sometimes called member services counselors or travel counselors, plan trips, calculate mileage, and offer travel suggestions, such as the best route from the point of origin to the destination, to club members. Travel clerks also may prepare an itinerary indicating points of interest, restaurants, overnight accommodations, and availability of emergency services during a trip. In some cases, they make rental car, hotel, and restaurant reservations for club members.

Passenger rate clerks generally work for bus companies. They sell tickets for regular bus routes and arrange nonscheduled or chartered trips. They plan travel routes, compute rates, and keep customers informed of appropriate details. They also may arrange travel accommodations.