Do I owe money ? Please help

It’s just a quick question, me and friend decided to go on a quick trip to Florida, for 3 days, it was about 600 for the plane tickets which I paid for for both of us and about 600 for the hotel reservation which they paid for. Again this included both of us. The trip is in 4 days and they decided last minute not to go. Do I owe them anything? ( ps they aren’t asking for money nor am I I’m just confused lol) what would be the right thing to do?