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:       What would you like to have in your breakfast , bread , egg or sandwiches ? 
 Person2:Bread . 
 Person1:        And milk or orange juice ? 
 Person2:Orange juice . 
 Person1:        What would you like for lunch , pork , mutton or beef ? 
 Person2:I think mutton is best . 
 Person1:        What kind of drink do you like most , red wine , beer or champagne ? 
 Person2:I like champagne . 
 Person1:        And among apples , oranges and bananas , which is your favorite ? 
 Person2:Banana of course . 
 Person1:        Do you always have meals outside or in your house ? 
 Person2:I always have meals outside , because I ’ m not good at cooking . 

formal