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: Would you please put that cigarette out ? I get sick on it .
Person2:You do ? OK , fine with me .
Person1: Thank you SO much .
Person2:But I also want ya to do me a favor .
Person1: What ?
Person2:You gotta have some better deodorant .
Person1: I ' m sorry ? !
A:
informal