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:       So how long do you plan to live here ?  
 Person2:We'd like to sign a year-long contract , if that's OK .  
 Person1:        Fine by me . Do you know how to read this kind of contract ?  
 Person2:Yes . We've signed them before . We even brought our chops .  
 Person1:        Great . When in Rome , you guys know what to do .  
 Person2:We'll sign our signatures , too . And give you our passport numbers along with our ARC numbers .  
 Person1:        That about does it . See you in a week . 

informal