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:       This is today ’ s schedule . At eight thirty , conference with the department managers . At 9 o ’ clock , live for the workshop where you ’ ll award prizes to the stafffor preventatives . 
 Person2:That ’ s great . What are the prizes ? 
 Person1:        3000 RIB as bonus for each person . 
 Person2:To encourage the staff increases . 
 Person1:        Ok . Next thing is laying the corner-stone for the new plant at 10 AM . At 12 AM , back here for lunch . 
 Person2:What about the afternoon ? 
 Person1:        At 2 PM , give a presentation here with the press . At four o ’ clock sharp , have dinner with Mr . Smith , manager of NCC . 

informal