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:       The time has come to say goodbye .  
 Person2:So soon . It seems as if you just got here .  
 Person1:        I feel that way , too . But all good things must come to an end , as they say .  
 Person2:It certainly has been a pleasure seeing you again and renewing old memories .  
 Person1:        I've had a great time and thank you for your spending so much time showing me around .  
 Person2:It was fun for me , too . It gave me a chance to get away from my routine .  
 Person1:        You'll be out to see me next year , as you promised ?  
 Person2:Oh , yes . I should be there some time next spring .  
 Person1:        I'll be expecting you then . 

informal