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:       Wow ! What happened to you ? You look sad .  
 Person2:I just lost my job . My boss just told me .  
 Person1:        That's unbelievable . Why did this happen ?  
 Person2:I don't understand of myself . It seems they have to save money .  
 Person1:        I cant't believe it . You've worked here for years . 

informal