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:       I need to get internet .  
 Person2:Which kind of internet connection do you want to get ?  
 Person1:        What kind can I get ?  
 Person2:There is dial-up or DEL .  
 Person1:        Which one do you feel is best ?  
 Person2:I would get DEL if I were you .  
 Person1:        DEL is better than dial-up ?  
 Person2:It's the best choice ; plus , it won't tie up your phone line .  
 Person1:        I'm not sure what that means .  
 Person2:Dial-up is connected through your phone , unlike DEL .  
 Person1:        That'll make it impossible for me to use .  
 Person2:Exactly . With DEL you don't have that problem . 

formal