An airline customer service agent works in an airport or a call center, providing information and assistance to the flying public. In a call center, an airline customer service agent helps customers with flight reservations, itinerary changes, baggage concerns and questions about customer loyalty programs. Face-to-face interaction occurs at airports. At a front counter, an airline customer service agent assists passengers with check-in, issues tickets, provides flight information, checks baggage and solves ticket-related travel problems. At the gate, airline customer service agents check boarding passes, upgrade seats and reissue tickets when a flight is overbooked. A workday may be routine or very stressful. For example, a weather or safety issue may cause the cancellation of several flights. Harried passengers trying to make a connecting flight or get to a destination may take their frustration out on the first employee they see. That employee is usually an airline customer service agent. Uncontrollable circumstances may leave a service agent without a remedy to a problem. Remaining calm under pressure and maintaining a smile is a critical duty of this job.