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 can I do for you ? 
 Person2:I want my hair cut . 
 Person1:        How would you like your hair cut ? 
 Person2:I'm not sure . What do you suggest ? 
 Person1:        Well , how about like this ? 
 Person2:I don't like it . It's outdated . 
 Person1:        Okay . How about this style ? 
 Person2:It seems a little too wild . 
 Person1:        Can you give me some idea of what you'd like ? 
 Person2:I want a haircut just like that kind . 
 Person1:        OK , I see . 

formal