1. showing attention
a: this cake tastes so delicious
b: are you serious? I made it by myself.
a: did you?
b: i did.
a: what a great girl!

2. asking repetition
a: you are so beautiful.
b: i am sorry, what did you say?
a: i mean you look so beautiful in that dress.
b: really?
a: yes, that dress really fit on you.
b: thanks