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 hate working on Christmas Eve ! Whoa ! Get a load of this guy ! Come in central , I think we ’ Ve got ourselves a situation here .  
 Person2:License and registration please . Have you been drinking tonight , sir ?  
 Person1:        I had one or two glasses of eggnog , but nothing else .  
 Person2:Step out of the vehicle , please . Sir , what do you have in the back ?  
 Person1:        Just a few Christmas gifts , to this season , after all !  
 Person2:Don ’ t take that tone with me . Do you have an invoice for these items ?  
 Person1:        Umm ... no ... I make these in my workshop in the North Pole !  
 Person2:You are under arrest , sir . You have the right to remain silent . You better not pout , you better not cry . Anything you say can and will be used against you . You have the right to an attorney , if you cannot afford one , the state will appoint one for you .  
 Person1:        You can ’ t take me to jail ! What about my sleigh ? It ’ s Christmas Eve ! I have presents to deliver ! Rudolph ! Prancer ! Dancer ! Get help ! 

informal