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'.
Problem: Person1: Does anyone mind me turning on the air conditioning ? It's hot in here .
Person2:Actually , I prefer if you didn't . Air conditioning makes me sneeze .
Person1: All right . I'm opening the window , though , is that OK ?
Person2:Oh , sure . It's very stuffy in here .
Solution:
formal