[exchange] pleasantries

to engage in polite and friendly conversation, often involving customary greetings or small talk

As they met for the first time, they exchanged pleasantries about the weather.
During the conference break, attendees exchanged pleasantries and contact information.
At the beginning of the meeting, the participants exchanged pleasantries before delving into business matters.
When entering a room full of people, it's customary to exchange pleasantries with those nearby.
It's common to exchange pleasantries with colleagues in the office kitchen during coffee breaks.