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:       Excuse me , what's the screen near your steering wheel for ?  
 Person2:It's a portable TV . It's a popular thing now .  
 Person1:        Oh , that's new to me . So what's on everyday ?  
 Person2:News about current affairs , documentaries , music , movies , noncommercial ads and so on .  
 Person1:        Is there anything interesting ?  
 Person2:Yes , there are something good and informative . I think that many people underestimate the value of TV in education .  
 Person1:        I agree . Are there any commercials on the TV ?  
 Person2:Of course . Because the TV stations need to make money from commercials between the programs .  
 Person1:        That makes a lot of sense . Does the TV work well ?  
 Person2:Not always . It depends on the transmission of the satellite signals .  
 Person1:        I got it . Do you pay for the programs ?  
 Person2:Yes , 50 Yuan per month . 

formal