Read this dialogue!

Chandra: Hello Erwin, how are you?

Erwin: I am fine, thank you. Who is that beautiful girl, Chandra?

Chandra: That is my cousin, Dina. Dina, come here, please! This is Erwin, my classmates.

Dina: How do you do?

Erwin: How do you do? Where do you live, Dina?

Dina: I live at Jalan Melati 4. Where is your address, Erwin?

Erwin: My address is Jalan Kenalan 37.

Chandra: Ok, Erwin. We have to go now.

Dina: Nice to meet you, Erwin.

Erwin: Nice to meet you too.

Chandra, Dina: Good bye!

Erwin: Bye. See you tomorrow!

Dina is Chandra's ____.