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:       Too ... your face is really oily ... perfect !  
 Person2:Why ? Are you planning to stir-fry my face ?  
 Person1:        Nope . I'm going to tell your fortune . So ... the oilier , the better .  
 Person2:You've gone bonkers , Jen .  
 Person1:        It's facial paper , and it fits into the rings of my binder ! It's magical .  
 Person2:OK . Let's see . Give me a sheet . 

formal