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:       Hello ? 
 Person2:Hi Vicky . 
 Person1:        Are you there yet ? 
 Person2:Yes . 
 Person1:        I just got off the subway . I'm almost there . Sorry I'm late . 
 Person2:That's no problem . I just wanted to tell you I'm inside . 
 Person1:        Where are you ? 
 Person2:On the second floor . 
 Person1:        Should I come to the second floor or do you want to come to the first floor ? 
 Person2:Come upstairs . 
 Person1:        What ? 
 Person2:Oh , Can you hear me OK ? I said , come to the second floor . 
 Person1:        Oh , OK . What are you doing there ? 
 Person2:Just looking at some books on how to learn English . 
 Person1:        Do you want to get something to eat later ? 
 Person2:No , I'm still full from dinner . 
 Person1:        What do you want to do ? 
 Person2:I don't know for sure . When you get here we'll talk about it . 
 Person1:        OK , see you soon . 
 Person2:Bye . 

formal