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:       I am going on my first date tonight . Can you give me some suggestions about what to wear ?  
 Person2:Well , I think you look very pretty in your polka dot purple dress with your hair piled at the rear . That makes you very graceful and mysterious .  
 Person1:        Yeah , that's a good idea . Let me try it .  
 Person2:Remember to match it with your glittering star-shaped necklace . Very attractive on formal occasions .  
 Person1:        Do I look more mature in the highheel shoes ?  
 Person2:Sure , more elegant and taller .  
 Person1:        I shall wear light make-up instead of heavy . The face powder will lighten my skin color .  
 Person2:If I were your date , I would be so charmed by you .  
 Person1:        Thank you . 

formal