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 purchase some business cards .  
 Person2:No problem . How many are you thinking about ?  
 Person1:        I think 2,000 would be fine .  
 Person2:If you'll just fill out this form , please .  
 Person1:        I want the new cards to be exactly like this card .  
 Person2:We can do that very easily .  
 Person1:        ... Okay , I'm done . Here's the form and my old card .  
 Person2:Great . Your order will take only one week .  
 Person1:        You know , I think it would be better if I could pick it up in three days .  
 Person2:We can do that . It'll just cost you extra . 

formal