What happens if a cancellation or amendment is requested within 24 hours of booking confirmation?

What happens if a cancellation or amendment is requested within 24 hours of booking confirmation?

This depends on the timing of your request:
I. Same calendar date as booking:
Most airlines allow free or minimal-charge cancellations/changes. You may only be required to pay fare differences (if any).
II. Within 24 hours but on the next calendar date:
If the 24-hour window crosses into the next calendar date, changes are subject to the airline’s fare rules and conditions. Charges may apply as per airline policy.