You will be given a definition of a task first, then some input of the task.
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'.

 Person1:       What ’ s the difference between football and rugby ? 
 Person2:Those tow games are quite different . First , there ’ s the size of the teams . In football , a team has 11 players . In rugby there are 15 players on each team . The biggest difference is that in football , only the goalkeeper can use his hands . In rugby , the ball is usually carried forward by players , though kicking is permitted . 
 Person1:        In rugby , players pass the ball by throwing it to team mates , don ’ t they ? 
 Person2:That ’ s right . However , players can only pass the ball backwards . They cannot pass the ball forwards to their team mates . That ’ s a foul . 
 Person1:        I know how goals are scored in football , but how about in rugby ? 
 Person2:If a team carries the ball over the goal line , they score points . A team can also score points by kicking the ball between two tall posts at each end of the pitch . 
 Person1:        There ’ s a lot more physical contact in rugby , isn ’ t there ? 
 Person2:Yes . Players usually need to bring a player down to stop him from moving forward with the ball . This is called ” tackling ” , as in football . 
 Person1:        The ball is a different shape in rugby , isn ’ t it ? 
 Person2:Yes . It ’ s not perfectly round like a football . A rugby ball is oval in shape . There ’ s a match on TV this afternoon . Why don ’ t you watch it with me ? I ’ ll try to explain the rules and tactics while we ’ re watching . 
 Person1:        Ok . 
Output:
formal