https://www.crmportalconnector.com/developer-network/forums/general-discussions/singapore---%CF%AD%CF%AD-738-%EF%BC%90%EF%BC%97%EF%BC%92%EF%BC%99-airlines-refund-policy-'https://www.crmportalconnector.com/developer-network/forums/general-discussions/singapore---%CF%AD%CF%AD-738-%EF%BC%90%EF%BC%97%EF%BC%92%EF%BC%99-airlines-refund-policy-'