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 . How's it going ?  
 Person2:I'm falling in love .  
 Person1:        What ! With who ?  
 Person2:That girl in my econ class . She is so hot .  
 Person1:        Did you guys go on a date already ?  
 Person2:No . I didn't even talk to her yet . But I think I'm in love .  
 Person1:        Does she have a boyfriend ?  
 Person2:I don't think so . I've been following her around campus and I haven't seen another guy .  
 Person1:        Dude , you're a stalker man . Just ask her on a date .  
 Person2:I plan on running into her in the cafeteria when she's alone . I think I'll ask her then .  
 Person1:        So why do you think you're in love ?  
 Person2:She's the only thing I can think of all day long .  
 Person1:        That's called blind love . Well , I gotta run . Tell me how it goes next week .  
 Person2:Aright . I'll talk to you later . 

informal