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:       What courses are you going to take next year ? 
 Person2:Well , I am certainly going to take chemistry and physics , but I haven't decided on the other subjects yet . I ’ d like to take English . 
 Person1:        Why are you going to take English with chemistry and physics ? 
 Person2:Because I want to study English literature . But I think chemistry is better for getting a job . 
 Person1:        Of course it depends on what you are going to do when you leave college . Have you decide what you are going to do when you graduated ? 
 Person2:I am going to be a , well , I hope to be a research chemist . 

formal