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:       Excuse me , Professor . I have to talk to you about why my homework didn't get done .  
 Person2:What happened that you didn't get it done ?  
 Person1:        I had to watch a football game instead .  
 Person2:Well , you had more than one day ; couldn't you have fit it in on another day ?  
 Person1:        Yes , I think so .  
 Person2:Either way , I only allow one missed assignment per semester . When will you be turning the make-up in ?  
 Person1:        I'll make it up next week .  
 Person2:Fine , but it cannot happen again if you want an “ A ” in the class .  
 Person1:        OK , I can do that .  
 Person2:Remember that you are in college now , not high school . 

formal