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:       Welcome to Credit Services . How can I help you ?  
 Person2:Hello . I'm here to talk about my credit card . You see , I'm a corporate card holder and a personal card holder . I've had my personal credit card for ages , but my corporate one is new to me .  
 Person1:        Right . Well , the benefits are a little different . With our Corporate Card you can use it for agency collection and payment .  
 Person2:Is there anything else ?  
 Person1:        There's quite a long list , actually ! You can use if for business trip expenses , medical expenses , any internal payments .  
 Person2:And I suppose I can do that anywhere ? I do have to travel a lot for my job and it's such a hassle using cash and collecting all the separate receipts .  
 Person1:        If you put it on your card , you can get an overall statement that lists all of the transactions .  
 Person2:In just one document ? That will definitely be a time saver . 

formal