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:       We have a live show of a football match this Friday night .  
 Person2:What're the teams ?  
 Person1:        Brazilian against AC Millan .  
 Person2:I bet AC Milan will lose . 

formal