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:       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