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'.

[EX Q]: Person1: Look , my clothes are wet .
Person2:Mine are wet , too .
Person1: Unexpectedly , a girl threw a bucket of water on me .
Person2:She wished good luck to you .
Person1: The Dai people are enthusiastic .
Person2:Yes .
[EX A]: informal

[EX Q]: Person1: Our philosophy teacher is very humorous .
Person2:I usually have the wrong notion that he's very serious .
Person1: No , not at all.The examples he gives are very interesting .
Person2:No wonder when I pass your room , I always hear your laughter .
[EX A]: informal

[EX Q]: Person1: You missed the film.That ' s a shame .
Person2:Is it stimulating ?
Person1: Yes . I got very excited .
Person2:I hope I still have chances .
[EX A]:
informal