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:       Hi , John ! I haven ’ t seen you for ages .  
 Person2:Hi ! Yes , it ’ s been a long time . I ’ m really glad to see you .  
 Person1:        I ’ m glad to see you , too . How ’ Ve you been ?  
 Person2:Just fine . How is everything with you ?  
 Person1:        Not bad . I finally bought a house . It ’ s an old one , but built really solid . It is close to here . Do you want to come over for lunch ?  
 Person2:I ’ d like that , but I ’ m flying home this afternoon , and I told my parents I ’ d meet them at the airport for lunch .  
 Person1:        OK , next time you ’ re here .  
 Person2:That ’ s a deal .  
 Person1:        I heard that you moved to Florida .  
 Person2:Yes , I ’ m in Titusville . The space shuttle is launched from near there . I ’ Ve seen a lot of space shuttle launches .  
 Person1:        Tell me more .  
 Person2:The shuttle launches are beautiful . I saw one that took off at midnight . The whole sky got bright .  
 Person1:        Sounds great !  
 Person2:I ’ m pretty happy living there .  
 Person1:        I want to see Disney World , Sea World , Universal Studios , and Weeki-Watchee Springs .  
 Person2:I ’ Ve been to all of them .  
 Person1:        I ’ m jealous . I ’ Ve never been to Florida .  
 Person2:The Sunshine State certainly is worth visiting . Come down for a vacation sometime . I ’ ll take you to Disney World .  
 Person1:        That sounds great ! I ’ ll take you up on that invitation .  
 Person2:I hope you do . And keep in touch , OK ?  
 Person1:        I sure will .  
 Person2:Here ’ s my business card . Send me an email once in a while .  
 Person1:        Count on it . And here ’ s my card . Don ’ t hesitate to call me anytime .  
 Person2:Thank you . I ’ d better get going . I don ’ t want to be late for lunch . Mom would worry .  
 Person1:        Well , I ’ m really glad we bumped into each other . Have a good trip .  
 Person2:Take good care of yourself , Mary .  
 Person1:        I will . Good-bye .  
 Person2:Bye-bye ! 

informal