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'.

Q:  Person1:       Do you think that climate change is responsible for the recent floods ?  
 Person2:It could be . There are floods in this country almost every year , but in recent years they have been more widespread and more frequent .  
 Person1:        It seems that the climate in this country is changing .  
 Person2:The summers are hotter . The last three summers have been the hottest for the past 200 years . There have also been stronger winds .  
 Person1:        I think that the changing climate is a sign that we are causing too much damage to the environment .  
 Person2:I think you ’ re right . Climate change naturally over time , but I think that human activities are speeding up the change . I wish that government would join together and try to resolve the problem .  
 Person1:        Me too . If we don ’ t do something soon , It might be too late . 

A: formal
****
Q:  Person1:       Oh , my god . How can you stand living in such a messy dorm ?  
 Person2:Our place is spotlessly clean , compared with others .  
 Person1:        Have you even tried to clean it once since you moved in at the beginning of the semester ?  
 Person2:In fact , I just swept the floor three days ago .  
 Person1:        I think we need to restart the dormitory sanitation inspection system .  
 Person2:I bet nobody will care about it . 

A: informal
****
Q:  Person1:       Well , no one could survive without water , but you see pollution has been making more and more water unable for drinking .  
 Person2:Yeah . Water pollution has for a long time been a major concern among the environmental issues .  
 Person1:        But what are the sources of water pollution ?  
 Person2:They could generally be divided into two categories  
 Person1:        Well , direct ones are the pollution directly from factories , refineries waste treatment plants etc . , aren ’ t they ?  
 Person2:Yeah . They are emitted directly into urban water supplies .  
 Person1:        But what about the indirect ones ?  
 Person2:Indirect sources include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rainwater .  
 Person1:        I see . For the sake of us all , we should be an active participator in the prevention of it .  
 Person2:Sure . It's an issue asking for everyone's participation . 

A:
formal
****
