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:       You know ... I did very poorly on that test . 
 Person2:Cheer up ! It's not the only chance in life to do well on a test . There'll be many more . 
 Person1:        Well , you know how I am about exams . I'm a perfectionist . 
 Person2:Don't worry about it . All in all , you've done very well in school . 

informal