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:       Hi , Alice , what are you doing this sunday .  
 Person2:Nothing really , why , what ' s up ?  
 Person1:        If you are free , maybe you can get having for my birthday party , it should be fun .  
 Person2:Sounds great , i ' d very much like having something thanks , when ?  
 Person1:        Around six pm .  
 Person2:Do you need help setting up or anything ? I don't mind . I like to do that kind of thing . It's fun and I have a good eye for decorating .  
 Person1:        No . thank you . I can handle it , but thanks for the offer .  
 Person2:Ok , I will see you again .  
 Person1:        Great . I have a good day , thanks again for the offer . 

informal