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:       My word , you do look ill !  
 Person2:I'm quite out of thoughts recently .  
 Person1:        You seem to have something on mind . Promise me , go to see the doctor right now .  
 Person2:I'm worrying about my exam .  
 Person1:        A piece of cake . You'll be successful . 

informal