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 , Becky , what's up ?  
 Person2:Not much , except that my mother-in-law is driving me up the wall .  
 Person1:        What's the problem ?  
 Person2:She loves to nit-pick and criticizes everything that I do . I can never do anything right when she's around .  
 Person1:        For example ?  
 Person2:Well , last week I invited her over to dinner . My husband and I had no problem with the food , but if you listened to her , then it would seem like I fed her old meat and rotten vegetables . There's just nothing can please her .  
 Person1:        No , I can't see that happening . I know you're a good cook and nothing like that would ever happen .  
 Person2:It's not just that . She also criticizes how we raise the kids .  
 Person1:        My mother-in-law used to do the same thing to us . If it wasn't disciplining them enough , then we were disciplining them too much . She also complained about the food we fed them , the schools we sent them too , and everything else under the sun .  
 Person2:You said she used to ? How did you stop her ?  
 Person1:        We basically sat her down and told her how we felt about her constant criticizing , and how we welcomed her advice but hoped she'd let us do our things . She understood , and now everything is a lot more peaceful .  
 Person2:That sounds like a good idea . I'll have to try that . 

informal