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'.

Input: Consider Input: Person1: Do you think maybe it would be better to just talk to Vince ? Explain the situation ?
Person2:No way . I want the satisfaction of squishing this bug myself . Plus , what if it's Vince ?
Person1: I don't think so . Your admirer seems kind of sweet . Aren't you even a little curious about him ?
Person2:He's just a distraction , like a mosquito buzzing in my ear . I want no distractions .
Person1: A little distraction might do you some good , Zina .

Output: formal

Input: Consider Input: Person1: Oh , what a pleasant surprise ! Don't you remember me ?
Person2:Mr.Black , if I'm not mistaken .
Person1: Right ! Glad to see you here .
Person2:Pleased to see you.too .

Output: informal

Input: Consider Input: Person1: Let me suggest this one . It's an excellent watch , it looks good , and it's only $ 100 .
Person2:Hmm . That's not too bad . Does it have a stopwatch ?
Person1: Uh , no . Analog watches don't come with stopwatches . You'll have to get a digital if you want a stopwatch .
Person2:Oh . I see . Where are your digital watches ?
Person1: Right here .
Person2:I don't like this kind as much . Never mind the stopwatch then . I'll take that other one . Do you take checks ?
Person1: Yes . Make it out to Time After Time .
Person2:Here you are .
Person1: Thank you .
Output: informal