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:       Waiter , bring me the menu , will you ?  
 Person2:Just a moment , I'm coming . ( ten minutes later ) . Now , what would you like ?  
 Person1:        I'd like to see the menu.Would you get me one , please ?  
 Person2:Yes , certainly.Here you are .  
 Person1:        Thank you.Ah ! But this is in French.Would you mind giving me the English menu ?  
 Person2:It's written in English too , in smaller print.There .  
 Person1:        Thanks . I'll need a while to choose.Could you come back in a minute ?  
 Person2:Right . ( five minutes later ) Now , what are you having ?  
 Person1:        I'm sorry , I haven't decided yet.Do you mind giving me a couple of minutes ?  
 Person2:All right , but would you be so kind as to make up your mind soon ? We're very busy just now as you can see , sir . 

informal