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's your business ? 
 Person2:Everything seems to be getting worse . I don't know what to do with it . 
 Person1:        Things are tough all over . You should never give up ! 
 Person2:But how can I prevent a deficit ? 
 Person1:        I think you should make a thorough market investigation now . 
 Person2:OK , OK . I ’ ll do my best . 
 Person1:        I always consider you are such a guy who never gives up . 
 Person2:I know life is not all roses , and I believe I will pull this through . 
 Person1:        Yeah , you can make it . 

informal