Pronouns

Akbar : Boey, can i borrow your device ?
Riski : Sure, here it is
Akbar : So, that's true
Riski : What are you talking about ?
Akbar : You have a girlfriend
Rizal : No, i think none of us have a girlfriend
Akbar : Yesterday, i saw him walked with a girl
Sakti : Who is this girl ?
Akbar : Here, he has her photograph
Sakti : Oh, she is a girl who sat in front of us at canteen yesterday
Rizal : Are you sure ? I looked at her yesterday. I think she is nice
Riski : Do you think she is pretty ?
Akbar : Of course she is
Sakti : Without doubt, JOSS
Rizal : I want to know her mobile number
Riski : My friend, She is MY SISTER !!!
Akbar : Oh My God
Sakti : That's just a praise
Rizal : You know, you have a nice sister