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:       So , how'd everyone do ?  
 Person2:Well , there's this clock I was ... MY vintage clock ! How do you have my clock ? ?  
 Person1:        Your vintage clock ? ! I just paid sixty-five dollars for it .  
 Person2:Sixty-five ? What the ... ? How did you bargain him down , Wei ? You've never even been to a flea market before !  
 Person1:        It must be my special touch . I think bargaining is in my blood !  
 Person2:Never underestimate a woman when it comes to bargaining ! 

formal