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:       So you are green with envy at your neighbor ? 
 Person2:Well , he ’ s really lucky . It seems that he could win the bet at every turn . 
 Person1:        But I don ’ t envy those who are filthy with dough . That ’ s not the whole life . 
 Person2:I know what you mean . I ’ m not only after bucks . There ’ s something more in life . 

formal