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:       So Kim , have you ever had anything stolen ?  
 Person2:Stolen ? No , why ?  
 Person1:        My uncle just had his motorcycle stolen a few nights ago . I was just thinking about how clever criminals are these days .  
 Person2:Criminals are clever ? They ’ re only successful when people are careless .  
 Person1:        I don ’ t know . The ones who stole my uncle ’ s motorcycle were pretty good .  
 Person2:If your uncle had an alarm system , then it wouldn ’ t have happened .  
 Person1:        He did . It was one of the best ones available . But that didn ’ t stop them from disabling it . And on a crowded street too .  
 Person2:Didn ’ t anyone stop them ?  
 Person1:        You would think that people would be smart enough to stop something like that . No one knew his motorcycle was being stolen . The thieves came in a truck and convinced everybody that my uncle was parked illegally and they were there to tow it away .  
 Person2:Wow , they were good . I guess criminals aren ’ t that dumb after all .  
 Person1:        That ’ s not the end . They were so good that they convinced a bystander to help them lift the motorcycle and put it in the truck . 

formal