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:       How is everything going with your girlfriend ?  
 Person2:Didn't I tell you ? It's over !  
 Person1:        Oh , I am sorry to hear that . I did't know that you had split up . What happened ?  
 Person2:It was a few things . The first thing that happened was that we were supposed to go out for a romantic dinner for our one year anniversary , but she stood me up !  
 Person1:        Really ! Did she tell you why she didn't show up ?  
 Person2:No , but I ended up finding out later that night when I saw her drinking with another man at a club near my home !  
 Person1:        What was she thinking ? Did you confront her about it when you saw her ?  
 Person2:I wanted to , but I knew that if I spoke to her , I'd just blow up at her , so I decided to just go home . I called her later that the night , but she didn't answer the phone .  
 Person1:        I can't believe she would do that to you . It's so dishonest-and rude !  
 Person2:I know . I still haven't heard from her . The good thing is that I'm so angry with her that I don't feel sad about not having her around .  
 Person1:        I bet you that she regrets what she's done . You are such a good catch ! She really lost out , didn't she ?  
 Person2:I guess so .  
 Person1:        So I don't think you'll have a problem finding another girlfriend . There are plenty of fish in the sea ! 

informal