I have some female Skype contacts. I see they are on "online" status. I didn't chat with them or rarely chat with them. So they are strangers. How can I chat with her? If I say "Hi", then she may reply with "Hi", then I don't know how to proceed because I don't know what to say. For example,

Me: Hi
Skype Girl: Hi
Me: How are you?
Girl: Fine, and you?
Me: Fine, too. What do you do?
Girl: I am a student