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:       Don't worry . I'm sure you'll do better next time .  
 Person2:I didn't realize it was so difficult though I know I'm always too nervous in such competition .  
 Person1:        It doesn't matter . Forget it .  
 Person2:I don't think I performed well .  
 Person1:        Oh ! That's much hetter than I did .  
 Person2:Can you tell me how to improve myself ?  
 Person1:        There's no secret at all . The only thing for you to do is to practice more . You will succeed .  
 Person2:Thank you for your encouragement .  
 Person1:        It's a pleasure . Come on . I'm on your side . 

informal