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: Are you sure that this is the place to wait for our school bus ?
Person2:Yeah . Look , other kids are coming this way .
Person1: But it doesn't look like a real bus stop .
Person2:That's because regular buses don't stop here .
Person1: How much is it going to cost ?
Person2:Nothing . It's free .
Person1: Is that yellow bus it ?
Person2:Let's go sit in the back . All the cool kids do .
A:
informal