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:       Steven , can you give us a summary about your work ? What do you get from your work ?  
 Person2:I have accumulated a wealth of practical experience in work as a chief advertisement designer . Moreover , I realized teamwork is the key to success .  
 Person1:        Why do you think so ?  
 Person2:I think building team spirit among the coworkers is very important . I believe we can accomplish a miracle if we stick together .  
 Person1:        Very good . Anything else ?  
 Person2:My advantage is that I have strong sense of responsibility . But I lack patience .  
 Person1:        I must praise you for your modesty and diligence . What's your plan next ?  
 Person2:I will listen and learn more when I start my new job . I plan to become more professional in my field .  
 Person1:        I've got to commend you ; you really did a good job .  
 Person2:Thanks for your compliment , but there is still plenty more to learn . 

informal