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:       What's taking you so long ?  
 Person2:Don't worry . I'm almost finished .  
 Person1:        I need you to hurry up .  
 Person2:All right . I'm finished .  
 Person1:        I think there's more you need to do .  
 Person2:What do you mean by that ?  
 Person1:        My hair looks awful .  
 Person2:What don't you like about it ?  
 Person1:        I just don't like my hair .  
 Person2:I'm sorry that you don't like it .  
 Person1:        I won't be paying you for this .  
 Person2:I'm sure we can work something out . 

informal