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:       Professor , I'm concerned about my grades . Do you have a minute ? 
 Person2:Of course , how can I help you ? 
 Person1:        I want to know if I am doing OK . 
 Person2:Let's pull out your scores so far . Do you think you are doing OK ? 
 Person1:        I am afraid that I might not be doing all that well . 
 Person2:I'm seeing that you are doing OK in some areas , but not so well in others . 
 Person1:        I think I could take better notes and read a little more . 
 Person2:You can greatly improve your grades by always reflecting on what you can improve on . 
 Person1:        I'm working on it ! 
 Person2:Just do your best and I am sure that you will see improvement . 

formal