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:       Yeah . Just pull on this strip . Then peel off the back . 
 Person2:You might make a few enemies this way . 
 Person1:        If they don't think this is fun , they're not meant to be our friends . 
 Person2:You mean your friends . I think it's cruel . 
 Person1:        Yeah . But it's fun . Look at those two ugly old ladies ... or are they men ? 
 Person2:Hurry ! Get a shot ! ... Hand it over ! 
 Person1:        I knew you'd come around ... 

formal