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:       Wow , American football is more exciting than I thought .  
 Person2:You ’ re in America now , my British friend . We just call it football .  
 Person1:        Oh , right . So , I can ’ t quite follow what ’ s going on ... who ’ s winning ?  
 Person2:The Giants are up by three points because of the field goal they kicked , but the Redskins have the ball and there pretty close to the end zone .  
 Person1:        Wow ! What a hit !  
 Person2:Yeah , he tackled him so hard his helmet came off .  
 Person1:        Is he ok ?  
 Person2:It looks like it , he ’ s getting up .  
 Person1:        I guess he hit him too hard ; the referee just called a penalty on the home team .  
 Person2:The Giants ?  
 Person1:        Yeah .  
 Person2:Well , here we go again .  
 Person1:        What happened ? Why did everyone get so quiet ?  
 Person2:The Redskin ’ s quarterback just threw a touchdown pass for seven points . We ’ re losing again . 

informal