In some situations, it may be necessary to change a passenger's travel plans and the check-in counter will handle these concerns. This may involve changing itinerary, upgrading class of travel, changing to an earlier or later flight but such changes are subject to the conditions of the tickets issued. Economy class tickets normally have high fees or the need to buy a new ticket for itinerary changes, since airlines want claim higher fares from business travellers, and demands from business travellers often include flexibility and late booking.