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:       Do you have any questions ?  
 Person2:Tell me about fees .  
 Person1:        What fees are you referring to ?  
 Person2:I want to know about overdraft fees .  
 Person1:        We charge a small fee every time you overdraft .  
 Person2:How much ?  
 Person1:        For each time you overdraft , you have to pay $ 25 .  
 Person2:That ’ s not a small fee .  
 Person1:        You shouldn ’ t overdraft .  
 Person2:That ’ s for sure .  
 Person1:        Do you need help with anything else ?  
 Person2:That ’ s all I needed to know . Thanks . 

formal