https://central.xero.com/s/question/0D58V00009RjsOZSAZ/ask-official18667380729-when-can-i-cancel-a-flight-with-%F0%9D%95%8A%F0%9D%9A%92%F0%9D%9A%97%F0%9D%9A%90%F0%9D%9A%8A%F0%9D%9A%99%F0%9D%9A%98%F0%9D%9A%9B%F0%9D%9A%8E