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:       Good afternoon . May I help you ?  
 Person2:Yes , I ’ m here to see Joanna Stevens . I have an appointment at four .  
 Person1:        Certainly , may I take your name ? I ’ ll let her know you ’ Ve arrived .  
 Person2:Sure , it ’ s Josh O ’ Neil .  
 Person1:        Ms . Stevens will be with you momentarily . Can I offer you something to drink ?  
 Person2:Yes , a coffee would be nice , thank you .  
 Person1:        Here you are . Ms . Stevens is ready for you now . I ’ ll show you to her office , right this way . 

informal