TASK 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'.
PROBLEM: Person1: Can I help you , sir ?
Person2:I wish to buy a diamond ring .
Person1: How many carats would you like it to be ?
Person2:I want five carats .
Person1: Is this one suitable for you ?
Person2:No , it seems too old-fashioned to my fiancee .
Person1: What about this ?
Person2:It seems too small for me , haven't you got any larger ones ?
Person1: Then you can buy this one . It's very nice and latest in style .
Person2:Oh , this one is perfect .

SOLUTION: informal

PROBLEM: Person1: Isabelle , you know I'm not interested in fame .
Person2:Well , you don't seem to be interested in getting a real job , either .
Person1: You know I'm interested in teaching . I'm looking for jazz students ...
Person2:Yeah , and every high school student in town is banging on your door , right ?
Person1: I know they're out there . I'll find them .
Person2:You're such a dreamer ! You think that you can spread the word of jazz in an underpass ?

SOLUTION: formal

PROBLEM: Person1: Tell me why you saw the movie twice .
Person2:I think it's the most successful film in scene-setting and music .
Person1: You bet it .

SOLUTION:
informal