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 are you doing today ?  
 Person2:Good . Thanks for asking .  
 Person1:        What may I do for you ?  
 Person2:I need help with something .  
 Person1:        What do you need help with ?  
 Person2:I am looking for a newspaper article .  
 Person1:        Have you looked in the periodicals ?  
 Person2:I didn ’ t even think about that .  
 Person1:        I can show you where they are .  
 Person2:That would be a lot of help .  
 Person1:        Follow me , please .  
 Person2:Thank you so much . 

informal