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:       You look hot and tired . Jack , have you been exercising ?  
 Person2:Yes . We just had a basketball match with Class Two .  
 Person1:        Who won ?  
 Person2:They did .  
 Person1:        What was the score ?  
 Person2:Seventy to sixty-seven . 

formal