Dialogue: Giving Advice

Mariona: Hi Clàudia, You look worried. What's the matter?
Clàudia: Er.. it's nothing.
Mariona: Is it the exam tomorrow? You shouldn't worry. You'll pass easily.
Clàudia: I know.
Mariona: Come on, tell me. What are you worried about?
Clàudia: OK... it's Mark. I think he has started smoking. I was talking to him yesterday about this topic and he says me that isn't smoking.
Mariona: That's serious. What are you going to do?
Clàudia: I'm not sure. I should tell someone. What do you think I should do?
Mariona: If I were you, I'd speak to his older sister. She's really friendly.
Clàudia: I've never met her. Can you com with me?
Mariona: Yes, of course. Let's go and find her.