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:       Hi , Jim . How are you ? I haven't seen you for a while .  
 Person2:I'm fine . I've been out of town . I just got back .  
 Person1:        Where were you ?  
 Person2:I was in New York for a wedding . 

formal