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 about a medication to help me with my problem ?  
 Person2:There are several types of medications that we can try for your high blood pressure .  
 Person1:        What types of medications would be best ?  
 Person2:For water retention , I am going to start you on Hydrochlorothiazide , which is a diuretic .  
 Person1:        What are the side effects from taking that drug ,  
 Person2:You need to stay hydrated on this drug , but most people experience little side effects .  
 Person1:        Will that one medication take care of all of my problems ?  
 Person2:For now I want you to take a second drug , Lisinopril , an ACE inhibitor .  
 Person1:        Am I going to experience any complications with that drug ?  
 Person2:The most you will experience will be a dry cough but you probably won ’ t experience anything negative . 

formal