It's nice to meet you
General societal rules dictate how the majority of our conversations go. They start with a formal greeting and introduction ("hello, my name is...") then move on to some basic formality questions such as "how are you". The majority of people can think of examples when they themselves have had a conversation like this, whether it be for a coworker, acquaintance, or family member. The author is correct when they say that conversations like these are more for politeness in an effort to avoid the awkward silence that can arise in situations like these. Efforts to avoid that awkward silence is why the author describes conversations like this as a mere politnes, instead of literal intent behind saying "lets get coffee". Although there may be a certain group of people who may truly enjoy having a conversation, and may truly mean it when they say "we should see each other soon" the majority of people have these conversations as a thing of politnesss.