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:       Hey , Jack ! Is Jenny coming with us ? 
 Person2:Yes . Why ? 
 Person1:        Nothing . I am just asking . 
 Person2:Just asking ? ! Why is your face burning like mad ? Ah-huh , someone has a crush on Jenny , doesn't he ? 
 Person1:        Who has a crush ? 
 Person2:Come on , Ted ! Don't be such a chicken . If you like her , you ’ Ve got to tell her . Maybe she likes you . 
 Person1:        Well , I don't have the guts to ask her out . 
 Person2:What are you so afraid of ? Just tell her what you are feeling about her . 
 Person1:        I ’ d totally die if she turned me down . 
 Person2:But that's better than keeping everything to yourself . You ’ Ve got to let her know . Come on ! You ’ Ve got to take a chance . Even though you are rejected , it ’ s not the end of the world . There ’ s nothing to lose , is there ? 
 Person1:        I don't know .. Well , maybe you are right , but how am I gonna tell her ? 

formal