I've been playing for a couple weeks now and out of all of the encounters I've had with joining people's parties, or somebody joining mine, most people don't even say a word. There was one time where I was doing daily order expedition and by the time I was heading to the boss, I had only noticed one of my NPC allies was actually a player who just joined silently.
Is this normal in the NA community? I'm not expecting a convo or anything, but this total silence is silly; not even a "hi."