It is better to book through the airline company itself as trip.com and other agents take a fee if there are last minute cancellations or changes of the flight. They are not ready to make exceptions for emergency illness or not fit to fly situations and have asked if they can make the exception of changing the ticket to a Flexi in case there is no control of when is it appropriate to fly out again. The change ticket has to have an end date and id you change after the departure date they charge exorbitant fees. In their opinion it's not them it's the airline policy and that has to be worked out from customer service of the airline. After a very harrowing experience I would suggest all to just book directly with the airline so you are not incurring two fees for the airline change and the agent fees change. If you book so make sure you are going to be well or if uncontrollable circumstances or sickness because of food poisoning occur then make sure to suck up loads of money to make the flight changes, trip.com doesn't really care or not come up with a policy for this.