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:       I really need to find a parking spot .  
 Person2:Are you looking for a space on or off campus ?  
 Person1:        Do you know any spaces on campus ?  
 Person2:You can park in the student parking structure .  
 Person1:        Where is it located ?  
 Person2:You'll find the parking structure on the west side of the campus .  
 Person1:        Do you have any idea if the parking structure has any spaces left ?  
 Person2:Last time I checked , it was pretty empty .  
 Person1:        What time was it when you went up there ?  
 Person2:That was earlier this morning .  
 Person1:        It wouldn't be full right now , would it ?  
 Person2:I have no idea . 

formal