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:       Excuse me . You can't leave your car here .  
 Person2:Oh , but I Just want to pick up a package . It won't take long .  
 Person1:        I'm afraid you'll have to find a parking meter .  
 Person2:Can I park here just for a second ?  
 Person1:        No , sir . I'm sorry you can't . 

informal