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:       Are you ready to order , sir ?  
 Person2:Yes . Can you show me the menu , please ?  
 Person1:        Of course . Here you are .  
 Person2:Then , what's special tonight ?  
 Person1:        Our seafood is fresh . I recommend shrimp with garlic .  
 Person2:All right . We'll have some seafood and vegetables . 

informal