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:       Good afternoon , sales department.May I help you ?  
 Person2:Could I speak to Mr Wood , please ?  
 Person1:        I'll see a piece available , who should I say is calling , please ?  
 Person2:John eng  
 Person1:        Hold the line , please.Mr Wood is in the meeting with managing director at the moment I afraid.Can I help you ?  
 Person2:Well , I want to discuss with them the new control we said last week .  
 Person1:        I don't think the meet will go on much longer , should I ask him to call you when he is free .  
 Person2:Yes , that will be easiest .  
 Person1:        Could I have your name again , please ?  
 Person2:Yes , It's John eng .  
 Person1:        And the number ?  
 Person2:01088256798  
 Person1:        Ok , you will be hearing from Mr Wood later in the afternoon then , Mr John .  
 Person2:thank you for help.good bye .  
 Person1:        You are welcome , goodbye . 

formal