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've got to put together a sales pitch to give to our clients in the morning . You always give such amazing presentations , I was hoping you could give me some advice about how to win them over tomorrow .  
 Person2:Sure , it's easy . First of all , the secret to a successful oral presentation is to keep things simple . People are listening and they usually don't have a long attention spans . Stick to about three or four points , give an overview of the points , then present them one by one , and then summarize at the end . Be straightforward and organized and you're sure to be remembered .  
 Person1:        What kind of visuals should I use to support the presentation ? Do you think I should use PowerPoint ?  
 Person2:You should consider the size and interests of your audience . In other words , who is listening , and what do they want to hear ... you can put together a PPT with some graphics and animations that will catch people's attention , but be careful not to go overboard .  
 Person1:        I think I can put something together , no problem . But when it comes to tomorrow , I'll just be a bundle of nerves ! How can I get over my fear of speaking in public ?  
 Person2:You know , stage fright is very normal , most people get nervous before they have to speak in front of large groups . Just prepare well , rehearse beforehand , and trust that you will be great ... and you will be ! 

formal