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: Jack , could you check your calendar ?
Person2:Sure , what's going on ?
Person1: We're planning a weekend camping trip , and we want to know which weekend is best for everyone .
Person2:Let me see ... The weekend after next looks pretty good.Otherwise , I'm all booked up .
A:
formal