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: Nice and warm again , isn ' t it ?
Person2:Oh , it ' s lovely . Think of the nasty weather we had last week .
Person1: How are you these days ?
Person2:Fine , thank you . And you ?
Person1: Fine today , though a bit under the weather last week .
answer:
informal

question:
Person1: Did you listen to the weather forecast ?
Person2:No.Why ?
Person1: There ' s a typhoon coming .
Person2:No way !
Person1: Yep , it should be here by tomorrow night .
answer:
informal

question:
Person1: What are the pop groups that you like ?
Person2:Oh , there are so many good ones ! I loved the Spice Girls . They were so cool !
Person1: I agree ! I cried for a week when they broke up .
Person2:I was really sad too , but at least I can still listen to their Cds .
answer:
informal