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:       In case you didn't know , I'm checking out in half an hour .  
 Person2:That won't be a problem , sir .  
 Person1:        That's good to hear . Now there's still a whole New York day ahead of me .  
 Person2:You're right , sir . Your whole day is still ahead of you .  
 Person1:        I still have time to explore more of New York , but I need a place to secure my baggage .  
 Person2:We have a storage place here , but you have to leave a deposit .  
 Person1:        A deposit , huh ? I would think my baggage would be enough of a deposit .  
 Person2:Just present your VISA card , and there won't be any problems .  
 Person1:        That deposit bothers me . Give me a minute .  
 Person2:Okay , sir , but remember how close it is to your checkout time . 

formal