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:       He told the police that Ted was the murderer .  
 Person2:He is playing hob with the fact .  
 Person1:        Why do you say so ?  
 Person2:Because he stayed with me all the time that night . 

formal