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:       How are you doing , Christopher ?  
 Person2:To be honest , I'm really fed up with work at the moment . I need a break !  
 Person1:        Are you doing anything this weekend ?  
 Person2:I have to work on Saturday all day ! I really hate my job !  
 Person1:        Are you available on Sunday ?  
 Person2:Yes , that's my only day off until Thursday .  
 Person1:        Ok , well , my friends and I are planning on going to the beach on Sunday . We tend to leave around noon whenever we go anywhere , so you could still sleep in . Do you want to come with us ?  
 Person2:That'd be fantastic ! Which beach are you going to ?  
 Person1:        It's a quiet beach just about an hour outside of the city .  
 Person2:What should I bring with me ?  
 Person1:        We've got plenty of inflatables , but if you want to sit on a chair , you'll have to bring your own sunlounger .  
 Person2:I can just use my beach towel . I love lazing around in the sun .  
 Person1:        Do you like surfing ?  
 Person2:I've actually never tried . Do you have a surfboard ?  
 Person1:        We've got a few . I can teach you how to surf on Sunday . It'll be fun !  
 Person2:I can't wait ! It sounds like we're going to have a great time . How much money should I bring ?  
 Person1:        You'll just need roughly $ 10 for food and gas money . My friend is driving , so we usually all chip in a few dollars for gas money .  
 Person2:Ok , where and when should I meet you ?  
 Person1:        We'll pick you up at your place at noon . Be there or be square ! 

informal