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: this bloody computer !
Person2:what seems to be the problem ?
Person1: my computer just crashed again for the third time today !
Person2:what were you doing when it crashed ?
Person1: i was just opening up an attachment in an email about winning the lottery .
Person2:I think that might have been a virus .
Person1: oh , no ! I thought it seemed a bit strange .
Person2:what kind of computer do you have , a Mac or a PC ?
Person1: it's a PC . doesn't everyone have a PC in this office ?
Person2:no , some people have Macs now , too .
Person1: what's the difference ?
Person2:PCs often crash from virus , but it's nearly impossible to get a virus from a Mac .
Person1: I didn't know that .
Person2:has your computer turned back on yet ?
Person1: yes .
Person2:did you end up losing any of your work ?
Person1: fortunately , I saved my work right before it crashed , so it should be OK .
Person2:you should probably call the IT department and have them check your computer for virus .
Person1: that's a good idea . I'll call them now . Thanks for your help !
Example Output: informal

Example Input: Person1: Good afternoon . I believe that this house is for sale .
Person2:That's right .
Person1: May I have a look at it please ?
Person2:Yes , of course . Come in .
Person1: How long have you lived here ?
Person2:I have lived here for twenty years .
Person1: Twenty years ! That's a long time .
Person2:Yes , I have been here since 1976 .
Person1: Then why do you want to sell it ?
Person2:Because I have just retired . I want to buy a small house in the country .
Person1: How much does this house cost ?
Person2:6850 pound .
Person1: That's a lot of money !
Person2:It's worth every penny of it .
Person1: Well , I like the house , but I can't decide yet . My wife must see it first .
Person2:Women always have the last word .
Example Output: informal

Example Input: Person1: What upsets you ?
Person2:My parents called . As usual , they reminded me again that I should have a plan to marry by my late 20s . Easier said then done . Who should I marry ? I have no time to go on a date .
Person1: It is not your mother finding one for you ?
Person2:I will find one myself , of course . I ' m a modern girl .
Person1: Perhaps you can try the three minutes date , the latest type .
Person2:You mean dozens of the opposite sex meet each other for three minutes in a dimly bar serving alcohol , I hate that idea .
Person1: No , there is an updated virgin , three minutes video date . I know an online dating website providing such service with a microphone and webcam , you can sigh for it . You can be face-to-face with a guy talking for maximum three minutes .
Person2:I don ' t think it makes sense . Three minutes is such a short time .
Person1: I think you can find out if there is a possibility of romance within the first second of meeting someone , so-called love at first sight .
Person2:Anyway , I don ' t want to post my face up for sale on the internet like that .
Person1: Don ' t worry . There are many other options using the internet as dating methods . Some sites operate at international standard even have got certifications . Of course , for these sites , you have to pay a membership fee . But all in all , it is more serious and professional . The chance of meeting a good and serious person who does not play games is higher .
Person2:I don ' t want to post my personal information on the internet . I ' m not knowing who is reading it .
Example Output:
informal