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:       What had make you so upset ?  
 Person2:Frank has gone out with Lucy again .  
 Person1:        What ’ s wrong with that ?  
 Person2:Lucy is known as a social butterfly . She has taken many rich men for a ride , you know . 

informal