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:       Does this TV work well ? 
 Person2:Yes , it is almost new here . 
 Person1:        Is it a color TV or a black and white TV ? 
 Person2:It is a color TV . You know , the rich people like the digital one now . So they have no room for them . 

formal