Quick question- 10th trip coming up 12/37-1/2. Due to a work obligation on 1/3 and flight availability- have to check out 1/1. In the past have always been able to change online but not letting me this time- says unavailable. Thinking I just have to call, maybe since it’s a holiday week? Does that sound right? I mean taking away a day when we are already staying 5 nights shouldn’t be an issue right?!?