[header] How to talk to a girl you don't know [title] Always look at a girl's face. [step] Never look at her body, she might think that you are a flirt. Also, eye contact is considered important when communicating in most western cultures. 
[title] Try to start with a " hello " or " hi " and a simple smile. [step] If she smiles back at you, it means she is paying attention to you now, and wants to talk to you.