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 is wrong with Peter ? He sure looks unhappy .  
 Person2:His girlfriend dumped him , and he is tearing his heart out over her .  
 Person1:        How foolish he is . The girl is inviting . She often makes a pass at boys .  
 Person2:Love is blind , you know . 

formal