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:       May I take your order ?  
 Person2:What's the specialty of the house ?  
 Person1:        The baked fish in tomato sauce is pretty good .  
 Person2:I like fish . Please bring me an order of that .  
 Person1:        Do you want some dessert ?  
 Person2:Apple pie , please .  
 Person1:        Single or double ?  
 Person2:Make it two . 

formal