It is not always the way we think. sometimes we have to cancel our travel plans due to any issue. With Turkish Airlines Cancel Flight, pessengers are allowed to make free cancellations without taking any stress. A cancellation fee will be charged sometimes but not every time. There are some conditions where pessengers have to pay the fee but if you are following the rules of the airline then you don't have to pay any kind of charges.

https://airlinespolicy.com/cancellation-policy/turkish-airlines-cancellation-policy/