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:       How many do you intend to order for our shirts ?  
 Person2:What's the minimum quantity of an order for your goods ?  
 Person1:        We are not interested in small orders . I suggest you order at least 2 000 dozen .  
 Person2:No problem . We want a minimum of 1,000 dozen of men's shirts and a minimum of 3,000 dozen of embroidered shirts . Can you guarantee continuous production and adequate supply ?  
 Person1:        Yes , of course . We have enough productivity . You can rest assured .  
 Person2:And for such a big quantity , you should give us a discount .  
 Person1:        Sure , we can reduce our price by ten percent .  
 Person2:That's great . 

formal