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In a win for kindergarten teachers everywhere, a U.K. airline is showing that being nice can bring lifelong rewards.

British budget airline Monarch is offering free upgrades to passengers who are polite to their call center of the phone.

The upgrades come with a fair share of caveats, however. Only people who need to phone the call center for a problem with their reservation will be eligible, so if everything functions properly in a passenger’s online reservation, he or she will presumably never have a need to contact the call center.

Polite callers can be rewarded with either extra legroom seats or priority check in — a value of approximately $25 or $3.65 respectively. And the airline is limiting the number of rewards to 10 reservations per week, meaning that approximately 25 people—or the average number of passengers on 10 reservations, per week will benefit, The Independent reported.

“We are often described as the nicer airline and holiday company and we pride ourselves on this,” Nils Christy, chief operating officer at Monarch, said in a statement. “Our customer services staff are already nice – now they can reward those who are positively nice to them too.”