Well, in general I make it a point to be as polite as possible in situations like that because it is not in my nature to be very outgoing and talkative. I tend

Well, in general I make it a point to be as polite as possible in situations like that because it is not in my nature to be very outgoing and talkative. I tend to be shy with people I don't know well. From the perspective of purely my own personality, getting by with a smile and a nod doesn't present much of a problem to me and is really the default state.