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 ? 
 Person2:Everything ’ s fine with me . 
 Person1:        What can I do for you today ? 
 Person2:Is it possible for me to view the apartment today ? 
 Person1:        Unfortunately , you will not be able to view it today . 
 Person2:Why can ’ t I view it today ? 
 Person1:        You ’ ll need to make an appointment to view the apartment . 
 Person2:I understand . May I make an appointment then ? 
 Person1:        How does this Friday sound ? 
 Person2:Friday at 6 pm . would be perfect . 
 Person1:        That will be fine . 
 Person2:Thanks for your help . 

informal