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:       Why do you look so sad ?  
 Person2:I ’ m in pretty bad shape . I am having an allergy all the time .  
 Person1:        Why not go and see a doctor ?  
 Person2:I never trust those stupid doctors . 

formal