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:       So do you believe in palmistry ?  
 Person2:Palmistry ? What is that ?  
 Person1:        It's when someone takes a look at another person's palm 4 to tell the future .  
 Person2:Oh , you mean palm reading 5 . I've seen that before , but I don't believe in it .  
 Person1:        Are you sure ? I've read a lot about palmistry and I've been able to tell a lot of accurate things about a person from his palm . Do you want me to take a look at your hand ?  
 Person2:Really ? You've read books about it ? Ok , then . But only if you want to .  
 Person1:        Ok , let's see , well , you've got a long life line , which is good , and the love line is strong ...  
 Person2:What else do you see ? Will I be successful ? Will I make a lot of money ?  
 Person1:        Hmm , hard to say , wait , yes , it looks like you will do well in business , and your ambition will help you a lot , but ...  
 Person2:What ? What is it ? What's the matter ?  
 Person1:        You seem to have a large gullibility line . You believe everything that you're told .  
 Person2:Hey ! 

informal