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:       He always likes to say something as if all his geese are swans .  
 Person2:I know this characteristic of him . So I never think seriously of his words .  
 Person1:        Yeah . This is a clever way to be in contact with such a person .  
 Person2:It seems that you don't like him .  
 Person1:        You like to communicate with him ? 

formal