Can I cancel an airline ticket within 24 hours on United Airlines?

Can I cancel an airline ticket within 24 hours on United Airlines?Can I cancel an airline ticket within 24 hours on United Airlines?Can I cancel an airline ticket within 24 hours on United Airlines?Can I cancel an airline ticket within 24 hours on United Airlines?Can I cancel an airline ticket within 24 hours on United Airlines?Can I cancel an airline ticket within 24 hours on…