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:       Hi , welcome to Hal's Computer World . Can I help you with anything ?  
 Person2:Yes , I'd like to buy a new computer , but I don't really know much about them . Can you give me any suggestions ?  
 Person1:        No problem . First of all , do you want to get a home computer or a laptop ?  
 Person2:Laptops are more expensive , right ?  
 Person1:        Yes , they generally cost a little more .  
 Person2:I'll just get a regular home computer then . I don't think I'll need to lug my computer around with me . 

formal