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 am trying to decide what school to apply to ? 
 Person2:Are you thinking about a public school or a private one ? 
 Person1:        I am not sure . What's the difference between them ? 
 Person2:Public schools are usually state funded , whereas private schools usually get their funding elsewhere . 
 Person1:        Which is better ? 
 Person2:One isn ’ t necessarily better than the other . It depends a lot on the school administration and the teachers . 
 Person1:        I hear you have to wear uniforms at private school . 
 Person2:Yes , sometimes . 

formal