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:       Both our countries are quite small . How would you describe the landscape in your country ? 
 Person2:My country is well know for being very flat . There are some hills in the southeast of the country . 
 Person1:        Is it really completely flat ? 
 Person2:Pretty much . The land rises and falls only a few meters . The southeast , the hills rise to a height of a few hundred meters . There are mountains over 1000 meters high in your country . 
 Person1:        Yes , there are . They are not very big compared with the mountains in other countries . 
 Person2:The coast of your country is very varied . The coast of my country is just made up of sandy beaches . 
 Person1:        That doesn ’ t sound too bad . Great for sunbathing ! The coast of my country changes even within a few kilometers . There are cliffs , then sandy beaches . Then rocks . There are lots of caves in the cliffs . There are also many small islands off the coast , but few people lives on them . 
 Person2:There are many lakes and rivers in your country too . We also have many rivers , but only a few lakes . 
 Person1:        We also have waterfalls in the mountains . They make the landscapes look very scenic . The landscape has been shapes by millions of years of erosion , especially by water . 

formal