Detailed Instructions: 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'.
Problem: Person1: Tell me why you saw the movie twice .
Person2:I think it's the most successful film in scene-setting and music .
Person1: You bet it .
Solution:
informal