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 have your order now ?  
 Person2:Yes , we'd have your regular dinner . What courses are there , please ?  
 Person1:        The courses for our regular dinner are , appetizer , soup , beef steak , dessert and coffee .  
 Person2:All right , we'll have it .  
 Person1:        What kind of dessert do you want ?  
 Person2:Do you have some chocolate cakes ?  
 Person1:        Yes , we have .  
 Person2:OK , we will choose it .  
 Person1:        Wait for a moment , I'll come back soon . 

informal