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 really should be on my way .  
 Person2:Oh , don ’ t go yet . Let ’ s at least have one more .  
 Person1:        No , thank you . I can ’ t .  
 Person2:It ’ s too bad that you have to leave so early .  
 Person1:        Thank you very much . I had a really good time .  
 Person2:Thanks for coming ! We should meet again sometime soon .  
 Person1:        That would be great ! Actually , can I get your phone number , Ella ? That ’ s assuming you don ’ t mind if I call you sometime .  
 Person2:Anytime . You can reach me 5558929 .  
 Person1:        ok , got it . I ’ ll call you sometime next week .  
 Person2:Fine .  
 Person1:        It ’ s time to go and I hope we can get together again soon .  
 Person2:I hope so , too . Bye ! Ben . 

informal