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:       How did you spend the weekend ?  
 Person2:I went to a movie with my boyfriend .  
 Person1:        Really ? How was it ?  
 Person2:It was great . The director took a lot of care while framing . They say be has good chance at winning the Oscar for best director . Also I like the actors , some really great new young actors .  
 Person1:        Oh , yeah ? What's it about ?  
 Person2:Well , it's the classic love story between two people from conflicting backgrounds . But besides a beautiful story , the cinematography is great . There is some really dramatic footage . It's really quite a visual feast . And the soundtrack is moving .  
 Person1:        Sounds pretty good . Is it a tragedy ?  
 Person2:The ending is a bit of a surprise . I don't want to ruin it for you .  
 Person1:        Oh , I like movies with surprise endings , although , sometimes they can be frustrating . Maybe I should invite my girlfriend to go next weekend .  
 Person2:It would be a really good choice . The movie is very suitable for lovers to see together . I'm sure you won't regret it . 

informal