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:       Have you been having any problems lately ?  
 Person2:No , but the nurse at school says that I should have my blood pressure checked .  
 Person1:        Do you have a history of high blood pressure ?  
 Person2:No , I have never been told that I have high blood pressure .  
 Person1:        High blood pressure is called the silent killer because it hardly ever has symptoms .  
 Person2:How do you check for high blood pressure ?  
 Person1:        We are going to use this cuff here , and it will give me a reading .  
 Person2:What do the numbers mean ?  
 Person1:        They tell me how much your heart is working at rest and when pumping blood .  
 Person2:Good . That will help me know how I am doing . 

formal