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:       Could you talk to me for a few minutes about my grades ? 
 Person2:Step into my office for a moment . What is your concern ? 
 Person1:        Am I failing ? 
 Person2:Let's go on the computer to see what's up . Do you think you are doing well ? 
 Person1:        I am pretty sure that I am in trouble . 
 Person2:I can see that you are trying , but where do you think you could improve ? 
 Person1:        I missed a few classes ; I need to make sure I come to school on a regular basis . 
 Person2:Having a regular study routine and following it is very important , right ? 
 Person1:        I'll try ; it's hard ! 
 Person2:Thanks for stopping by ! 

informal