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'.

Input: Consider Input: Person1: I wonder if we can change to Channel 5 .
Person2:Why ?
Person1: I want to know what's on that channel .
Person2:Oh , good .
Person1: There is a football match .
Person2:I prefer TV play to football .
Person1: OK . Could you turn it down ?
Person2:What are you going to do ?
Person1: I'm going to listen to the radio .
Person2:Maybe we can enjoy the TV play together . It's interesting .

Output: formal

Input: Consider Input: Person1: Jane's mother always wants her to marry a big shot . J
Person2:That is just wishful thinking . The cost of higher education has increased in recent years , faster than the cost of living . So she wants Jane's brother to go on studying and earn his doctorate by means of it .
Person1: But it's unfair for Jane .

Output: informal

Input: Consider Input: Person1: Did I do well on my test ?
Person2:Do you want to know the honest answer ?
Person1: Why wouldn't I want to know ?
Person2:You had pretty bad scores .
Person1: Exactly what do you mean by bad ?
Person2:You failed .
Person1: How'd I fail it ?
Person2:There are a couple of reasons why you didn't pass .
Person1: What did I do wrong ?
Person2:To sum it all up , you really just don't know how to drive .
Person1: Thanks.Will I be able to take a retest ?
Person2:Sure you can , in about two and a half weeks .
Output: formal