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:       just don't understand why we have to take the subway . Look at this place . It's modern enough . But it's far from lively .  
 Person2:It's convenient . People in network go everywhere by subway if they don't drive .  
 Person1:        This isn't network , Frida . We are in San Francisco .  
 Person2:What's the difference ?  
 Person1:        We haven't come here in business but for pleasure . We should go out exciting . What can you see in the subway ? Nothing !  
 Person2:What can you see from a tram or a double-decker ?  
 Person1:        I can see people who are walking on the sidewalk . I can see cars driving on the streets . I can see the sun shining and beautiful flowers dancing in the wind . I can even smell the scent of flowers and the freshness of the air .  
 Person2:But they are not as convenient as the subway .  
 Person1:        You miss the point ! We are not in a hurry to go anywhere .  
 Person2:Well , maybe you are right . We'll be more amused in a tram or a double-decker than on the subway .  
 Person1:        I'm so glad you can finally see things in my way . Can we leave this dull place now ?  
 Person2:What about the tickets ? I've already bought them .  
 Person1:        Just throw them away ! 

informal