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 don't know about you , but I'm famished . Are you interested in getting a bite to eat ?  
 Person2:That sounds great . I'm absolutely starving ! What kind of food are you in the mood for ?  
 Person1:        I'd love something spicy . Maybe we could get some Sichuan Hotpot .  
 Person2:You're a woman after my own heart . I don't know many people who can handle spicy food . Are you sure you are up for hotpot .  
 Person1:        Sure . If I could , I would eat hotpot every day !  
 Person2:Ok , you're really all eyes when it comes to talking about food , aren't you ?  
 Person1:        Well , let's stop dragging our feet and find a Sichuan Hotpot restaurant for dinner !  
 Person2:Let me think about it for a minute . Let's see ... oh the name of the restaurant is on the tip of my tongue ! Give me a second and it'll come to me .  
 Person1:        Well ... ? Have you thought of it yet ?  
 Person2:No ...  
 Person1:        Never mind . There's an authentic tasting hotpot restaurant not far from the China World Trade Towers on Chang An Street . Have you been there ?  
 Person2:That's it ! That's the one I was thinking of ! I told you I'd remember it !  
 Person1:        You really have a bid head , don't you ! 

informal