it's a pleasure

(it's/it was) (one's) pleasure

A response to "thank you" or "thanks" meaning that one was glad to do it and would do it again. A: "Thanks for picking up that package for me." B: "Oh, it was my pleasure. Happy I could help." A: "Thank you so much for helping my children, officer." B: "My pleasure, ma'am."
See also: pleasure

it’s a ˈpleasure

used after somebody thanks you for doing something to help them: ‘Thanks for the meal.’ ‘It’s a pleasure.’
See also: pleasure
References in classic literature ?
It's a pleasure to help people who appreciate our efforts.
It's a pleasure to obey a laird; or should be, to the young.