When I was growing up, I was taught that there were four ways to address people. As in -

"Good morning, Sir."

"Hello, Mr Jones."

"Hi, George."

"Oi, you."

I think, the singular greatest failure of people today is that they have forgotten (if they ever knew) how to talk to each other.

The question "Oi, mate, can you hold the door?", gets the response "Yes I can, but no I will not, because I am not your mate."

Where as "Excuse me, could you please hold the door for me?", gets me standing in the rain for half an hour, holding a door for a total stranger.

People are all the same - you say the right things to them and you will get the right response.

Regards

Chas