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 do you spend your free time ?  
 Person2:I read or go swimming , go shopping , usually . I run or play tennis or do something else like those to get some exercises to keep fit .  
 Person1:        Are you introverted or extroverted ?  
 Person2:I wouldn't call myself extroverted . Sometimes , I enjoy being by myself very much . But other times , I like sharing activities with others too , especially during these last few years .  
 Person1:        What kinds of sports do you like ?  
 Person2:I like almost all sports , and I enjoy both playing and watching . I especially like tennis and mountain climbing .  
 Person1:        What kind of personality do you think you have ?  
 Person2:Well , I approach things very enthusiastically , I think , and I don't like to leave something half-done . It makes me nervous-I can't concentrate on something else until the first thing is finished . 

formal