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 kind of personality do you think you have ? 
 Person2:I am quite active and energetic . I approach things enthusiastically and I don't like leaving things half done . 
 Person1:        Do you think you are introverted or extroverted ? 
 Person2:I am quite outgoing , I think . I enjoy mixing and doing things with others . 
 Person1:        What do you think is the most important thing for you to be happy ? 
 Person2:I maintain that the most important thing is having good friends . A person can't live alt by himself , I think . A friend in need is a friend indeed . So the more really close friends I have , the better . 
 Person1:        What kind of people do you like to work with ? 
 Person2:People who are honest , dedicate to their work and have integrity . 
 Person1:        What kind of people do you find difficult to work with ? 
 Person2:Slacker and those who violate working procedures and ignoring deadlines . 

formal