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:       Hey , Jim . I didn ’ t know you biked to work . 
 Person2:Yeah , it helps keep me fit and helps the environment , too . 
 Person1:        One less car on the road means less pollution . 
 Person2:Right . Since my work is near a park , it ’ s a really nice ride , too . 
 Person1:        How far is it ? 
 Person2:Oh , about 10 miles . It takes me about an hour . 
 Person1:        That doesn ’ t sound too bad . I wish I could do it , but I work in the city . So I take the train . 
 Person2:You ’ re doing your part for the environment by using public transportation , too . 
 Person1:        True . Well , see you tomorrow . 
 Person2:See you . 

informal