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 do you think of the lawyer's speech ?  
 Person2:He has a glib tongue . Few people can argue him down .  
 Person1:        Don't believe him . He's liar .  
 Person2:We cannot expect a man like him to speak the truth . 

formal