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're in big trouble , Jason . Nick is beating us by a long shot .  
 Person2:Impossible ! Well , I'm not giving up yet . It's not over till the fat lady sings !  
 Person1:        OK , comeback kid . Here's you last question.How many times did Robin Williams win the Oscar for Best Actor ?  
 Person2:Hmm . Let's see ... there was Good Morning , Vietnam , Dead Poet's Society , The Fisher King ... Three , right ?  
 Person1:        Nope , sorry ! Actually , Robin Williams has never won an Oscar for Best Actor--only for Best Supporting Actor ! 

formal