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:       Would you like to ask any questions ?  
 Person2:I need to know about the fees .  
 Person1:        What kind of fees ?  
 Person2:I ’ m asking about overdraft fees .  
 Person1:        You have to pay a small fee every time you overdraft .  
 Person2:What ’ s the fee ?  
 Person1:        The fee is $ 25 every time you overdraft .  
 Person2:How is that a small fee ?  
 Person1:        That fee should keep you from overdrafting .  
 Person2:I ’ ll say .  
 Person1:        Do you have any more questions ?  
 Person2:I don ’ t need to know anything else . Thank you . 

formal