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:       Hello .  
 Person2:Hello , Claire . This is Mick .  
 Person1:        Mick ! Nice to hear from you again . How are you ?  
 Person2:Fine , thanks . And you ?  
 Person1:        Oh , not so bad . I've been very busy , but I'm going away on holiday soon .  
 Person2:Good . Listen . I'm phoning because I want to invite you to a party . At our Newhouse . And . .  
 Person1:        New house ? Really ?  
 Person2:Yes . We've moved . That's why we're giving the party . Can you come ?  
 Person1:        Well , that depends . When is it ?  
 Person2:This Saturday evening .  
 Person1:        Well . . . I'm going away on Sunday morning . Very early . Will the party go Convery late ?  
 Person2:Until two in the morning . But you don't have to stay that long.Well ? What about it ?  
 Person1:        All right . I'll come . But I'd like to bring a present Something for your new house.What would you like ?  
 Person2:Nothing . I mean , don't bring anything . It isn't necessary .  
 Person1:        But I'd still like ...  
 Person2:Just bring yourself ! I'm looking forward to seeingyou again . It's been a long time !  
 Person1:        Yes , it has . I'm looking forward to seeing you . too . and your new house . Uh . . . when does the party start ?  
 Person2:Come any time after eight . All right ? .  
 Person1:        Yes . Oh . by the W ..  
 Person2:Bye ! See you on Saturday evening .  
 Person1:        Wait a moment , Mick . You haven't . . . Mick ? Are you still there ? You haven'tgiven me your new address . Hello ? Mick ? Hello ? 

informal