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:       Can I take your order ?  
 Person2:I'll take two value meals .  
 Person1:        What kind of drink do you want with those meals ?  
 Person2:One Coca Cola and the other a Sprite , please .  
 Person1:        You can super-size your meals for only three dollars extra .  
 Person2:Yes , I'd like that , then .  
 Person1:        How about anything for dessert , like an apple pie or ice cream ?  
 Person2:No , thanks . That will be it . 

formal