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'.

Example Input: Person1: Jenny , you look terrible . What's eating you ?
Person2:Don't brother me !
Person1: Hey , Chillon , I'm just trying to help .
Person2:Sorry , Sally , it's not your fault .
Person1: So , what's the problem ?
Person2:I drew a blank on ~ about the test .
Person1: No kidding ! Didn't you study for it ?
Person2:Yeah , but nothing was clear during the test .
Person1: That's too bad , anyway , I'm sure things will turn around next master .
Person2:I'm thinking of dropping out .
Person1: You can't do that , Jenny !
Person2:I'm dead serious about this , Sally .
Person1: Come on , let's talk about it .
Example Output: informal

Example Input: Person1: Oh !
Person2:What fools we were !
Person1: To think of it ! All my old silver ! It meant so much to me .
Person2:And my new car . To think that he simply drove off with everything in my car . That's what hurts me most .
Person1: What's so terrible too , is the fools we've made of ourselves .
Person2:I hardly dare call the police . They'll just laugh at us .
Person1: I'll never get over it . Oh , Harry , it was all so unnecessary . That man ! ! How could he do this to us after we'd put him up ?
Person2:And his story didn't even hold together . I feel such an idiot .
Example Output: informal

Example Input: Person1: Recently I have been getting headache and my eyes come to see focus properly .
Person2:When did you last time have your eyes checked ?
Person1: Two years ago . At that time I had no problems . Now I can ' t even make out something ten meters away .
Person2:Come over here . I will test your eyes . First cover your left eye like this , and when I point , please read the chart from the top , and go as far as you can telling me which way the " E " points .
Person1: All right .
Person2:Good . Now the other eye .
Person1: Well , this one is worse .
Person2:Never mind , just read as far as you can .
Person1: I can only read the first three lines .
Example Output:
formal