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:       What ’ s wrong with it ?  
 Person2:It ’ s broken . I just bought it yesterday , you know , it costs me $ 556 .  
 Person1:        It sounds too bad . What will you do ?  
 Person2:Mike suggests me to return it .  
 Person1:        That ’ s what I want to say . 

informal