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:       Hey , Gucci . I didn't know it would be a charity show . You can see there are many collecting boxes at the entrance . 
 Person2:Oh , I forgot to tell you this . The show is to collect money for children in need . And all the money from ticket selling will go to the Red Cross . 
 Person1:        That's really a good thing . Let's do our part . 
 Person2:Good idea . 
 Person1:        Who will sing in the show ? 
 Person2:A lot of stars , including Andy , Justin , Mendy ... 
 Person1:        Mendy ? Are you sure ? I love her songs ! 
 Person2:Me too . She is so young and talented . She is not only a singer but also a great composer herself . 
 Person1:        Yeah . Though she was so popular , I heard she managed to maintain a low profile . 
 Person2:She is a real star . Not a onetime thing . 
 Person1:        But I also heard some people didn't like her music . I don't understand why . She is so amazing ! 
 Person2:Well , I suppose people have different tastes on music . Moreover , here stuff is really strong and creative . It takes time for people to accept new things . 
 Person1:        You are right . Anyway , things will be different as the days go on . She can get it . I have faith in her . 
 Person2:Sure . That makes a good fan . Do you know what songs she is gonna sing tonight ? 
 Person1:        Here is the programme . Check it out yourself ! 
 Person2:OK . 

informal