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 do I look in this new dress ?  
 Person2:You ’ d better change it . It ’ s ugly .  
 Person1:        How about this one ?  
 Person2:It ’ s really elegant and it fits you really well . 

formal