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 , Ms . Barkley . How are you ?  
 Person2:Fine , thank you , sir . It ’ s nice to see you again .  
 Person1:        Good to see you again , too . How ’ s you family ?  
 Person2:Very well , thank you , Mr . Parker . 

informal