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:       Francis , what ’ s that ?  
 Person2:Well , that is the chart showing our company ’ s organizational structure .  
 Person1:        Could you tell me something about it ?  
 Person2:Ok . On the top , Mr . Thomas , the managing director , is responsible for running the company .  
 Person1:        How many departments do we have ?  
 Person2:Four . They are production department , finance department , sales and marketing department and HR department . I directly report to Mr . White . He is on a business trip and is suppose to be back this morning . Probably you will be meeting him at lunch .  
 Person1:        Ok . Who should I report to ?  
 Person2:Mr . White , too . 

formal