If it’s point to point service with no onward connection, I’d say it’s a rejection most of the time. If it’s part of an itinerary with a close onward connection with some flight delays on the day, luck is better but not guaranteed even a third of the time. The smaller, short-haul stations tend to be more generous with this, perhaps because the staffing situation means they are more likely to face you when things go wrong than staff at the hubs.

Generally, I find the CPH and ARN and OSL ticketing staff to be ok enough but fair-minded sticklers for the rules. Gate agents are a bit more free-wheeling, but the GA staffing situation has gotten tighter over the years and made it less likely they have as much time to assist even if the GAs were previously inclined to help. Overall, I find SK way more flexible in this regard than AF, KL, BA or LH/LX/OS.