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'.

Person1: Darling , this dress is for you . I hope you like it .
Person2:Oh , very beautiful . Thank you , Steven , I like it very much .
Person1: Your birthday is coming , and I think this dress suits you . Why not try it now ?
Person2:My birthday present ? I can't help telling you that I am a happy woman , darling . I will come back soon . ( Go to her bedroom and wear the new dress , then show it to Steven . )
Person1: It fits me exactly . How does it look like ?
Person2:It displays your slender figure , darling .
Person1: The most important thing is that you bought it for me . I am happy that you know my size and style .
Person2:Because you are my dear wife .
informal

Person1: Excuse me , I bought this sweater yesterday . But when I got home and tried it on , I found it ' s too small .
Person2:Do you have the receipt with you ?
Person1: Yes , here you are .
Person2:Thank you . Do you want your money back ?
Person1: No , can I exchange it for a bigger one ?
Person2:I am afraid this is the biggest size we have .
Person1: Oh , that's too bad .
Person2:Maybe you would like to try this one with the willow pattern . The price is the same and it's bigger .
formal

Person1: What kind of music do you like listening to ?
Person2:I like music that has a fast beat and is lively , like dance music . You know , I go to a disco almost every week . Sometimes it's too loud though . You prefer classical music , don ' t you ?
Person1: Yes , I do . I find it very relaxing . I often listen to Mozart or Bach in the evening after a hard day at work .
Person2:I must admit that I like several pieces of classical music . It ' s certainly more sophisticated that modern dance music .
Person1: Classical music is supposed to be good for you brain . Research suggest that it makes your brain more active . Students who listen to classical music while studying perform better .
Person2:Really ? Perhaps I should listen to classical music often . I heard that listening to classical music is helpful in reducing stress .
Person1: Yes . That ' s why I listen to it in the evenings . I usually play it as background music while I ' m cooking or doing other housework .
Person2:I ' Ve got a few classical music CD ' s . I should follow your lead and increase my brian power .
Person1: You can find plenty of recording on the internet too . You can listen to samples and then buy them very cheaply if you like them .
Person2:That ' s a good idea . You should do the same with some music . You might find something you like . Classical music might make you clever , but dance might make you livelier and happier .
Person1: That ' s true . There ' s clear evidence that people who listen to lively music are lively people . Music can influence a person ' s feeling and character .
informal