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:       When could we meet to discuss the project ?  
 Person2:I will be available on Monday or Tuesday . Choose which day is best for you .  
 Person1:        I prefer Monday .  
 Person2:Good . Can you come in the morning or would afternoon be best ?  
 Person1:        Either one is OK .  
 Person2:Great ! When I check with the others , I will send you an exact time . When you come , be prepared to do your presentation .  
 Person1:        I will be prepared to do my presentation .  
 Person2:Who would you like to see there ? Just the sub-committee or should we ask the whole committee ?  
 Person1:        Everyone needs to be there .  
 Person2:That will probably be best . Do you need help with directions ?  
 Person1:        I think I know where it is . Maybe you could send me directions just to make sure .  
 Person2:OK . We will e-mail you all the information you need tomorrow . Have a good day ! 

informal