https://knowt.com/note/1e5a7afb-fc31-459b-bc6b-d57c4f149cf7/Can-I-cancel-a-non-refundable-United-fli youmobs 9 hours ago https://knowt.com/note/1e5a7afb-fc31-459b-bc6b-d57c4f149cf7/Can-I-cancel-a-non-refundable-United-fli