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 do you think are the most important things to do when running a business ?  
 Person2:Well , there are several things . Of course , you must do everything you can to keep costs down and revenues high .  
 Person1:        So , do you think workers should be paid as little as possible ?  
 Person2:No . if you do that , the workers won ’ t like their jobs . They will be less efficient and you will get a high staff turnover . Those things will increase you costs .  
 Person1:        How can a business maximise revenues ?  
 Person2:You need to invest in some good advertising . You have to know where your potential customers are and target them . It ’ s no good trying to sell computer games to older people . The market is too small .  
 Person1:        What else do you suggest ?  
 Person2:Find out what other companies charge for the same products or services . Price yourself near the low end . Don ’ t be much cheaper than everyone else , because many customers distrust very cheap things . They think that is must be poor quality if it ’ s that cheap . 

formal