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:       I am a little nervous about my presentation on Friday .  
 Person2:If you would like me to , I could help you with that .  
 Person1:        Wouldn't that take you away from your project ?  
 Person2:I have plenty of time to do this . I promise you it won't be a problem for me .  
 Person1:        Is there a good time for you to help me ?  
 Person2:If we work on this tomorrow night , you could easily be ready by Friday .  
 Person1:        How about meeting in my office ?  
 Person2:That would work out well . Bring any concerns that you might have .  
 Person1:        Sounds like you'll be able to help me a lot .  
 Person2:Don't worry . Everything will go well . I promise ! 

informal