https://www.crmportalconnector.com/developer-network/forums/general-discussions/%CE%BB%EF%BD%93%EF%BD%8B-738-0729-%CE%BE%EF%BD%98%EF%BD%90%EF%BD%85%EF%BD%92%EF%BD%94-does-singapore-airlines-have-a-24-hour-cancellation-policy