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:       How is your new car ?  
 Person2:Perfect . Couldn't be better .  
 Person1:        Why do you say so ? Can I see your new car ?  
 Person2:Of course you can . ( Lead Carl to his garage . )  
 Person1:        Wow , this new car is dynamite ! It is a shiny , beautiful car .  
 Person2:My car is simply a daisy . It drives smoothly .  
 Person1:        The car has very sleek lines . I love it .  
 Person2:I am glad to hear that . I'm really pleased with it .  
 Person1:        You made a good choice . 

informal