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'm really happy that you came to visit me .  
 Person2:I really missed you a lot .  
 Person1:        I've been missing you like crazy .  
 Person2:I don't understand why you haven't come to visit me .  
 Person1:        Lately , I've been quite busy .  
 Person2:Tell me what you've been up to .  
 Person1:        I've really been working a lot lately .  
 Person2:I've been pretty busy myself .  
 Person1:        So what have you been up to ?  
 Person2:I've just been working a lot .  
 Person1:        Whatever the reason may be , I'm glad you visited me .  
 Person2:I'm glad I did too . 

informal