i am handicap & i book my family ticket in 3 ac with concession. concession is available for me & my wife & my daughter ticket in full charge, but sum reason my wife [handicap escort] not travailing , i want to cancel my wife ticket, then i want to know that my daughter ali gable for concession?, now i cancelled all ticket & received new ticket there is waiting list ticket, confirm ticket is not available, so what can i do?.