It is polite to greet a person you know However, you don't always have time to stop and have a conversationJust remember to smile as you say hello A small wave is also polite. Sometimes you pass the same person a second time on the same day. You can say "hello again" or just smile.
* Slow down to greet someone you know. You don't have to stop what you are doing (walking, working, shopping).
* Say an appropriate form of hello
*Smile and wave.