Which of the following describes double booking?

Double booking refers to the practice of making multiple reservations for the same client, which is accurately described by the answer provided. This can occur when a travel agent or client secures several bookings for the same service—such as flights, hotels, or car rentals—often without the knowledge of the other involved parties. The potential for double booking arises in scenarios like a client requesting multiple options and not cancelling earlier reservations, which can lead to logistical complications and potential penalties.

Understanding this concept is crucial for travel agents, as it is important to ensure that client needs are met without overlapping the same services, which could result in confusion and unintentional costs for clients. Other options do not accurately capture the essence of double booking. For instance, booking a reservation with last-minute discounts, using two agencies for one trip, or creating a reservation for different clients do not involve the core issue of overlapping bookings for the same individual.