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:       Oh , please ! Don't be so old-fashioned ! It's totally safe .  
 Person2:I sure hope you didn't trust anyone with your credit card number .  
 Person1:        All I did so far was make a bid on the Buddha . It was easy !  
 Person2:Easy ? Ha ! ! It was easy for them to cheat you ! !  
 Person1:        Oh , come on ! I just gave them my e-mail , my address and my phone number . And my name , of course . 

informal