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 , how ’ re you doing ? 
 Person2:Terrible . 
 Person1:        Oh , what ’ s the matter ? 
 Person2:I ’ Ve got a fever and really a bad headache . 
 Person1:        Oh , that ’ s too bad . Why don ’ t you take some aspirin ? 
 Person2:I ’ Ve already tried some but it didn ’ t help . 
 Person1:        Well , it ’ s necessary for you to see a doctor . 
 Person2:Yeah , I guess I should . 
 Person1:        Well , you ’ d better get some rest . 
 Person2:Thank you very much . 
 Person1:        Bye . 

informal