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 you , Mr . Polly ?  
 Person2:What ’ s wrong ? I want a break from this horrible job .  
 Person1:        Then , buy a bottle of soft drink .  
 Person2:Would you like to buy a bottle for me in the shop ?  
 Person1:        It ’ s a problem , because my boss is in that shop now .  
 Person2:Ok , I will go there myself .  
 Person1:        Sorry , Mr . Polly .  
 Person2:It doesn ’ t matter . Oh , God , I have only four dollars in my wallet . Is that possible for me to buy one ?  
 Person1:        Have a try . 

informal