instruction:
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'.
question:
Person1: Cathy , I'd like to introduce the new microwave stove of mine to you , because it is easy to use .
Person2:OK , it so happened I want to buy one .
Person1: This microwave stove has many functions . Let me show you . For example , if you want to cook meat , you just need to put meat in it , and press the button with a picture of meat , that ' s OK . After several minutes , you can eat the delicious meat .
Person2:I think it ' s good , and it suits me , because I'm not good at cooking . Is it expensive ?
Person1: Oh , it is not so expensive . It only costs me 280 dollars .
answer:
formal

question:
Person1: Song , I hate to say goodbye , but I have to .
Person2:Nice meeting you , Kevin . I hope to see you again .
Person1: Let's keep in touch .
Person2:Sure , let's . Goodbye , then .
answer:
informal

question:
Person1: Are you going to watch the Indy Five Hundred on TV this weekend ?
Person2:I'm not really into racecar driving .
Person1: You were when we were in high school . That , and baseball .
Person2:Yeah , well , times change . Look at you-you're a father now . You can't say that you haven't changed .
Person1: True , but I still have to watch my baseball . The season's in full swing now .
Person2:I mean , I know spring training's over , but I'm just not into all that .
Person1: Hello ? Is the real Taylor in there ?
answer:
formal