Several airlines require the traveller to perform reconfirmation procedures, even though the airline ticket has already been reserved, paid, confirmed, issued, partially checked-in and flown. A typical reconfirmation rule is: for each flight (or more precisely, a "leg"[1]) within the trip, the traveller must explicitly re-notify ("reconfirm") to the airline,[3] by telephone or at the airlines' counter,[3] that the traveller still intends to take the reserved flight. The call must be done within a determined range of time in advance of the flight.