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 did he say ?  
 Person2:He said he would tell us the secret of becoming a successful man .  
 Person1:        It ’ s too good to be true ! If I were there , I would ask him if he himself was a successful man .  
 Person2:Nobody would drive him up a wall by asking him such a question , you know . 

formal