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:       Who are we going to play with today ? 
 Person2:We are playing against Hainan . 
 Person1:        Oh , the basketball team from No . 1 College ? I know they're a tough team . 
 Person2:Sure they are . 
 Person1:        Who's winning ? 
 Person2:We are , 27 to 26 . 
 Person1:        Really ? I thought that they'd been killing us by now . 
 Person2:How can it be ? We are a tough team as well . 

informal