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: Who's that over here ?
Person2:That's the new teacher .
Person1: What do you think of the teacher ?
Person2:She's very nice .
Person1: What does she teach ?
Person2:English , of course .
Person1: Is she your teacher ?
Person2:Yes.She teaches our class three times a week .
Person1: Can she speak Chinese to her students ?
Person2:Not very much .
Person1: It's a good thing you can speak English !
A:
informal