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 did you do last night ?  
 Person2:I just stayed at home and watched TV .  
 Person1:        Did you watch the Barcelona versus Madrid game ?  
 Person2:Yes , it was a very evenly matched game .  
 Person1:        What were the results of the game ?  
 Person2:It ended in a tie .  
 Person1:        What was the actual score ?  
 Person2:It was three all .  
 Person1:        Really ? I thought Barcelona was going to win . They are a much better team than Madrid .  
 Person2:If Barcelona had played as they normally do , they should have won .  
 Person1:        What happened ?  
 Person2:Their goalkeepers got injured after the first goal , but he kept on playing anyway .  
 Person1:        That explains it .  
 Person2:How many more games are left this season ?  
 Person1:        That was the last game before the playoffs .  
 Person2:When do the playoffs start ?  
 Person1:        In a few weeks . Are you planning on watching them ?  
 Person2:Of course ! I really love watching football games on TV .  
 Person1:        Me , too ! Do you want to come over and watch the next game at my place ? I'm planning on having a few people over to watch it together .  
 Person2:Sure , that would be great .  
 Person1:        Ok , it's a date then ! 

informal