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:       What did the doctor say ?  
 Person2:He said that I have been eating too much .  
 Person1:        Did he give you any advice ?  
 Person2:Yes , he asked me to clean up my diet by cutting red meat .  
 Person1:        Yes , you must put yourself on a diet . 

formal