https://b.hatena.ne.jp/entry?url=https%3A%2F%2Fwww.steadyhealth.com%2Ftopics%2Fhow-do-i-change-my-flight-if-i-booked-through-a-travel-agent-with-spirit-airlines
https://b.hatena.ne.jp/entry?url=https%3A%2F%2Fwww.steadyhealth.com%2Ftopics%2Fhow-do-i-change-my-flight-if-i-booked-through-a-travel-agent-with-spirit-airlines