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: not a single email until now ? it's already twelve o'clock . I can't believe it !
Person2:can't bear it , right ? I've been there before . I'll feel comfortable if no one calls me or sends me text messages , like there is something missing .
Person1: yeah , that's right . If no one sends me test messages , I'll go crazy .
Person2:actually , this is a kind of addiction called " infomania " or " information overload " .
Person1: addiction ? checking emails and text messages often can be called an addiction ? no way !
Person2:yes , it is . Do you consider a frequent check of your income emails to be an integral part of your working day ?
Person1: absolutely .
Person2:do you have your cell phone with you wherever you go and check text messages and phone calls from time to time ?
Person1: yeah , it's a must . Otherwise , I may miss important phone calls and text messages .
Person2:do you open all your IM tools whenever you're using a computer ?
Person1: yes . MSN , QQ , Skype , Google Talk , Ali wangwang , everything , so that I'll be in touch with all friends and relatives .
Person2:now I can tell you're definitely addicted to the overflow of information .

Output: informal

Input: Consider Input: Person1: Have you obtained any certificate of technical qualifications or license ?
Person2:Yes , I have received an Engineers Qualification Certificate and a drivers license .
Person1: How many years have you had the drivers license ?
Person2:I have two years driving experience .
Person1: That ' s good . What special skills do you have , can you tell me ?
Person2:I have experience in computer operation , proficiency in Microsoft Windows , Microsoft Word and Microsoft Excel .
Person1: What computer languages have you learned ?
Person2:Visual C + + , C and Delphi .
Person1: Have you gotten any special training in programming ?
Person2:No , but I have database programming experience and network knowledge .

Output: formal

Input: Consider Input: Person1: I hear Yolanda has been studying every night this week for the exam .
Person2:That's good , but I think it's too late . She hasn't studied all semester , and I doubt she can catch up in one week .
Output: informal