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'.
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Question: Person1: ... I knew it . I always knew you were a lesbian !
Person2:She's my roommate , not my date . The D-man , as in dork .
Person1: Haha . Still got that great sense of humor , I see . Here's my card . I sell used cars . A car from us is a car you can trust !
Person2:Alrighty then . Didn't you use to date Sheryl ?
Person1: Sweet little lassie . Yep , broke her heart when the D-man told her he couldn't be a one-woman guy .
Person2:Oh ? I heard she dumped you . Anyway , she's right over there . Oh , Sheryl !

Answer: formal

Question: Person1: Do you know that John isn't going to come back to our school ?
Person2:Really ? Why ?
Person1: He had moved and held a party on July 1st .
Person2:It's a pity that I was traveling around Europe at that time .
Person1: Even he's not coming back to school anymore , you still can call him and meet him on weekends .
Person2:You're right ! I will call him this weekend and meet him .

Answer: informal

Question: Person1: I wish you wouldn't play the TV so loud .
Person2:Sorry . Were you trying to sleep ?
Person1: Yes , please ask when you want to borrow my records next time .
Person2:I'm sorry . You're right . I should have asked .

Answer:
informal