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 like small towns .  
 Person2:But many roads are very narrow .  
 Person1:        Not always , and there're also few cars !  
 Person2:Yes , because of fewer people . 

informal