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'.

Person1: I'm not sure , is this our stop ?
Person2:Yeah , get off the bus .
Person1: Do you have any idea where we are ?
Person2:I'm really not sure .
Person1: This can't be the right stop .
Person2:I don't think this is right .
Person1: We got off too early , didn't we ?
Person2:Yeah , we did get off too early .
Person1: I should've just stayed on the bus .
Person2:I messed up .
Person1: Great , we have to walk now .
Person2:You want to wait for the next bus ?
informal