Given the task definition and input, reply with output. 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 used to be down on the sales people until I saw her in action .
Person2:She means business , for sure .
Person1: Most salespeople seem like half-brains . Zina's definitely an exception .
Person2:We'd better get back to work .
Person1: Yeah , I'm not too worried about Vince , but I'd hate to face Zina if we don't deliver ...
informal