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 , Mary . You look pale today . What's the matter with you ?  
 Person2:I think I've caught a cold . Now I'm aching all over .  
 Person1:        You'd better take some medicine and have a good rest . I hope you'll be yourself pretty soon .  
 Person2:Thank you . I suppose I should go to see a doctor . 

formal