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:       Have you met John recently ?  
 Person2:I saw him last week . It seems he was a bit queer in the head .  
 Person1:        Yes , he has been like that since his accident .  
 Person2:What a pity ! 

formal