Definition: 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:  Person1:       Tell me something about your work experience . 
 Person2:Well , I have been in the computer engineering field for 6 years now . I am familiar with both hardware and software and with hands-on experience in system development including system analysis and design . 
 Person1:        What systems have you worked on ? 
 Person2:I have worked on about every system that is out right now . 
 Person1:        Do you feel comfortable with the new system by microcosm ? 
 Person2:I am not as familiar with it as I am with some of the older systems . But I am a fast learner and I can master it in a short time . 
 Person1:        What do you consider your strengths ? 
 Person2:I am knowledgeable and levelheaded . 

formal