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:       Hey , John . Nice car .  
 Person2:Thanks . I finally got rid of that old Nissan that got me through college .  
 Person1:        What is this , the new Ford ?  
 Person2:No , it ’ s last year ’ s model .  
 Person1:        True . How much did you pay ?  
 Person2:$ 14,500 . It only has 10,000 miles on it , so it ’ s like a new car .  
 Person1:        Does that mean you ’ re not going to take the train to work anymore ?  
 Person2:Well , sometimes , I think it ’ ll be nice to drive to work instead . We ’ ll see . Want to go for a ride ?  
 Person1:        Yeah , sure .  
 Person2:Come on . 

informal