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:       It's said that the government will clamp down on the new policy . 
 Person2:Are you sure of that ? 
 Person1:        I am not certain about that . 
 Person2:They may have some difficulty in doing it . 

formal