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'.

Q: 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 .

A: informal
****
Q: Person1: I am not convinced by your explanation . Could you explain it ?
Person2:Sorry , I really can't do that . There's little time left for us .
Person1: I can't accept your excuse . It's five o'clock .
Person2:Yeah . But I have an appointment with Ann .
Person1: Ok , sounds good . But I think it's your trick .

A: informal
****
Q: Person1: Who do you think will win the championship ?
Person2:I really can't say . Both teams this year seem really good .
Person1: There's a game on tonight . You want to watch it with me ?
Person2:That sounds great !

A:
informal
****