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 feel confused by all the diet options out there . I don ’ t know which one actually works .  
 Person2:Most of them are not so practical . It will be very bad for your health if you skip lunches or supers as the recommended . I think making an exercise plan can be more effective .  
 Person1:        Maybe you ’ re right . It is very expensive to go to a weight-loss center . I ’ d better join in a fitness club .  
 Person2:You don ’ t need to lose weight , you are not fat .  
 Person1:        I bought an exercise dress yesterday and I found it was hard to dress it up . 

informal