Detailed Instructions: 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: And what's your vision ?
Person2:20/350 .
Person1: Mine's 20/20 . Life just isn't fair , is it ?
Person2:Oh , yes , it is .
Person1: What do you mean ?
Person2:You'll find out when we're in the woods and you have to go to the bathroom ...
Person1: They don't have toilets at the campground ?
Person2:Let's just say I'll have it easy ...
A:
formal