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:       How are you going all these days ?  
 Person2:Fine , thanks .  
 Person1:        But you look depressed .  
 Person2:I have some problem with my work .  
 Person1:        Is it serious ?  
 Person2:I can solve it , thanks .  
 Person1:        How about your family ?  
 Person2:Everything is Okay . And as soon as I see my son at home , all my worries vanish into the blue . 

informal