A passenger has the choice of canceling a ticket within 4 hours of booking. The cancellation done during this point period is going to be fully refundable and no fees are applicable thereto. If the passenger cancels the ticket after 4 hours, then charges are applicable. The varies consistent with the booking fare of the ticket. The refund amount is often claimed for the govt taxes and other taxes too. The request for the refund is merely applicable within the case of an unused ticket or the passenger doesn't board the flight.