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 ?  
 Person2:I ’ m fabulous .  
 Person1:        What can I help you with ?  
 Person2:I need to make a withdrawal .  
 Person1:        How much are you withdrawing today ?  
 Person2:I need $ 300 .  
 Person1:        What account would you like to take this money from ?  
 Person2:Take it from my checking account .  
 Person1:        Here ’ s your $ 300 .  
 Person2:Thank you so much .  
 Person1:        Will you be needing anything else ?  
 Person2:That ’ s it for today . 

informal