Definition: 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'.
Input:  Person1:       I don't think the teacher had a right to say that.The teacher was wrong to have accused her in front of the whole class . 
 Person2:You've got to be joking ! It's the teacher's right to say anything wants , and if she saw Myra cheating , she certainly had the right to say so . 
 Person1:        I agree she had the right to say something , but I feel she should have done it privately . 
 Person2:You're right.If I were the teacher , I wouldn't have done that . 

informal