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'.

Person1: Hi , I have a doctor ' s appointment scheduled with Dr . Smith , and I need to change it .
Person2:What day did you have it scheduled for ?
Person1: My appointment was on Tuesday .
Person2:What time was it scheduled for ?
Person1: It was for two o ' clock in the afternoon .
Person2:I see your appointment . What day would you like to switch to ?
Person1: I would like to switch it to next Friday .
Person2:What time would you like ?
Person1: I would like to come in at 10
Person2:Fine , I will pencil that in right now . We will see you then .
formal

Person1: So , what happened ?
Person2:He never came .
Person1: He stood you up .
Person2:I wouldn ' t exactly characterize it in that way . I think something happened . Something terrible and unexpected that made it impossible for him to ... what if he showed up , took one look at me and left ?
Person1: Not possible .
Person2:Maybe , there was a subway accident .
Person1: Absolutely .
Person2:A train got trapped underground with him inside .
Person1: And no phone .
Person2:And you know , how those express trains create suction .
informal

Person1: Tom has grown six inches within a year .
Person2:He has reached puberty . His mind and body both will change a lot .
Person1: Yeah , do you see his Adam's apple ? It becomes bigger .
Person2:Time is flying . I still remember everything when he was a child .
formal