以为是针对保级有什么措施，结果只是针对预定进行灵活的退改签程序。首先声明。
这个政策也许不适用于每个人，因为1K本身在退改签上就有很大的灵活性。
以下是重点：
Before you fly
To give you the greatest flexibility, when you book any flight with us now through March 31, you can change it for free over the next 12 months – any ticket, any fare type, any destination.
随意12个月内的日期、不论舱等、不论目的地！
其他的邮件内容基本上都是废话...
Our teams are in daily contact with the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), federal agencies and other global health organizations to share the most up-to-the-minute information to ensure the actions we're taking are comprehensive and appropriate.
In the air
Our aircraft are equipped with state-of-the-art circulation systems, similar to those found in hospitals, which use a high-efficiency (HEPA) filter to circulate the air and remove more than 99% of airborne particles. We're also adjusting our inflight service to limit person-to-person contamination. This includes handing beverages directly to customers instead of allowing customers to touch a tray and ensuring all flight attendants wear gloves during service.
即使取消也不给你退款，只是给credit。Tickets: For tickets issued March 3 through March 31, 2020, customers will be permitted to change free of charge to a flight of equal or lesser value up to 12 months from the original ticket issue date. If the new flight is priced higher, the customer may change for no fee but must pay the fare difference. If the new flight is priced lower, the customer may change for free but no residual value will be given. If the customer decides to cancel their flight, they can retain the value of the ticket to be applied to a new ticket without fee for travel up to 12 months from the original ticket issue date.Cancellations: If the customer decides to cancel the flight they booked between March 3 and March 31, 2020, they can retain the value of the ticket to be applied to a new ticket without fee for travel up to 12 months from the original ticket issue date. 
