(It's been) good talking to you.
and (It's) been good to talk to you.; (It's been) nice talking to you.a polite phrase said upon departure, at the end of a conversation. Mary (as the elevator stops): Well, this is my floor. I've got to get off. John: Bye, Mary. It's been good talking to you. John: It's been good talking to you, Fred. See you around. Fred: Yeah. See you.