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 really admire you , Diana .  
 Person2:why , Jerry ? Your words just came out of the blue .  
 Person1:        you are really happy and able to achieve high scores at school .  
 Person2:I work very hard and that's it , you know , practice makes perfect .  
 Person1:        isn't there anything else ?  
 Person2:I have no idea .  
 Person1:        you must have a high IQ score .  
 Person2:well , Jerry , let me tell you a secret .  
 Person1:        go ahead .  
 Person2:my IQ score is slightly above average .  
 Person1:        seriously ? But you are such a genius .  
 Person2:maybe I've got a higher EQ . I'm not sure .  
 Person1:        well , perhaps you're right . Sometimes EQ matters more than IQ .  
 Person2:you can say that again , Jerry . And I'm sure you're high in both of them . With a little more time cracking the books , you can also get high marks .  
 Person1:        oh , thank you . I'm going to the library , are you coming ?  
 Person2:let's go ! 

informal