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:       Is this the class to prepare for interviews ?  
 Person2:This is the right place . Please join us .  
 Person1:        I have an interview tomorrow , so I hope I can learn everything quickly .  
 Person2:We are all going to have great interviews . What are some things that we need to remember in an interview ?  
 Person1:        I think that we should make sure that our looks are the best they can be .  
 Person2:Right , and what about our friendliness and attitude ?  
 Person1:        Yes , and being friendly and having a good attitude also help me relax .  
 Person2:Did you know that they pay as much attention to what you ask as to what you say in an interview ?  
 Person1:        No , I didn ’ t . What else should I keep in mind ?  
 Person2:Just relax , listen carefully to the questions , and be honest in your responses . 

formal