The clerks were helpful and 'courteous'.
He answered my questions 'courteously'.
I appreciated his 'courteousness'.
(..) Well, perhaps you'd care to lend us your view on this questionnaire, sir. Oh, no, no, no, no. You were doing fine. You had been courteous and receptive to courtesy. You had established trust, with the embarrassing truth about Miggs. And now this ham-handed segue into your questionnaire. (..)1991 The Silence of the Lambs