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:       What happened to that girl you were seeing ? 
 Person2:Oh Jackie ? We broke up last week . 
 Person1:        That was a short relationship . You only started dating 2 months ago . 
 Person2:It was actually a long two months . She was a psycho . 
 Person1:        What do you mean ? 
 Person2:She would be laughing one moment , and if I said something insensitive , she would start crying . I didn't want to deal with that . 
 Person1:        She sounds very emotional . 
 Person2:She was a psycho , man . One time we were suppose to get together . I was waiting for her call , and when she finally called , she was screaming why I wasn't at her place . 
 Person1:        Were you suppose to be there ? 
 Person2:I thought she was going to call when she was done shopping . It was a misunderstanding . She was literally screaming on the phone over this . 
 Person1:        Ok . You're right . She's a psycho . 
 Person2:I'm just glad it's over . 

formal