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:       Hmm , what should I wear today ?  
 Person2:Come on , you think about what to wear almost every day . There are thousands of clothes in your wardrobe .  
 Person1:        Well , haven't you ever heard people say that there is always one piece of clothes missing from a woman's wardrobe ?  
 Person2:I have and I can prove that is 100 % true for you .  
 Person1:        Loving to look beautiful is women's nature . In fact , I am thinking about going to my favorite clothing shop today .  
 Person2:No kidding ! Again ? ! You just went shopping yesterday . You really are a shopaholic .  
 Person1:        Well , I need to change the shoes I bought from Nasi . They are too small . I want to ask them whether they come in a larger size .  
 Person2:OK . Do you have the receipt with you ? I think they will ask you to show them the receipt first . 

formal