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:       Will you be done doing my hair soon ?  
 Person2:Give me a little while longer .  
 Person1:        How much time do you need ?  
 Person2:There you go . How do you like it ?  
 Person1:        I think it looks gorgeous .  
 Person2:You think it looks nice ?  
 Person1:        I honestly think it looks great .  
 Person2:Thanks . I'm glad that I did a good job .  
 Person1:        How much is it for my hair ?  
 Person2:Just give me $ 55 .  
 Person1:        Thanks for doing such a good job .  
 Person2:No problem , girl friend . I'll see you next time . 

informal