You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Q: Person1: What was the last movie you saw ?
Person2:A Korean film called Friends , starring Sang Dong-gun .
Person1: Really ? I've seen that movie , too .
Person2:How did you like the movie ?
Person1: I thought it was pretty good .
Person2:Really ? I can't say I agree .
Person1: You're kidding . The story and acting were outstanding .
Person2:I guess I expected too much from the movie , so I was a bit disappointed .
Person1: I guess it could happen .
A:
informal