???????????? ???????????????????????? ???? ???????????????????????????????? ???????????????????????????????????????????????? ????????????????????????, but the terms depend on the type of ticket you have purchased. For most standard tickets, if you need to cancel your flight, you may be subject to a cancellation fee. To cancel a flight, simply contact KLM’s customer service at +????-??... https://www.devex.com/people/what-is-the-cancellation-policy-for-klm-2457594