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:       OK . I'll take your bet , as long as the winner gets to pick the movie . What about you , Nick ?  
 Person2:Sure . Do you want to go first , Sally ?  
 Person1:        Why not ! I rolled a five . The category is Best Pictures .  
 Person2:OK , here's your question What movie won the 1996 Oscar for Best Picture ?  
 Person1:        I know that , it's The English Patient . It was one of the only good American movies of the 90s .  
 Person2:Well , along with Jurassic Park ! Nice going , you got the right answer . 

formal