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:       I would suggest roast beef , sir . 
 Person2:All right , roast beef , please.And I'd like to start with soup . 
 Person1:        We have clear and cream soup at your choice.Which one do you prefer ? 
 Person2:Clear soup , please . 

formal