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:       Either we'll be millionaires , or we won't ... won't have a dime .  
 Person2:And it's all coming down to the next three weeks .  
 Person1:        The only person who seems confident the software will be done on time is Zina .  
 Person2:Yeah , she is some kind of Superwoman , isn't she ?  
 Person1:        Failure just isn't an option for her . I'm glad she's on our team . 

formal