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:       Come on , Tara . Let ’ s go up to the window and buy two tickets . The movie is starting in a few minutes . 
 Person2:We can ’ t break into the line . Don ’ t be so impatient . We ’ ll be at the front of the line soon . 
 Person1:        Two tickets , please . How much are they ? 
 Person2:Oh no , Ari . I didn ’ t mean for you to pay for me when I invited you to go tonight . Let ’ s go Dutch . I ’ ll pay my own way . I insist . 
 Person1:        I ’ m looking forward to this film . I read a good review of it in this morning ’ s newspaper . 
 Person2:Me , too . It will be great to see something light and funny for a change . I ’ m tired of heavy drama . 
 Person1:        Are these seats okay ? 
 Person2:They ’ re fine , but I can ’ t watch a movie without popcorn . 

formal