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:       I heard many stories about your brother .  
 Person2:He's a hero in our town .  
 Person1:        What does he look like ? Is he handsome ?  
 Person2:Yes , indeed , People say he's the smartest young man . 

informal