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:       There are so many record players here.That is hard to choose .  
 Person2:Look at this one.It has a radio and cassette player and built in speakers .  
 Person1:        I'd rather get one with separated speakers.They give a clear sound .  
 Person2:Yes , but we shouldn't get any thing too big.Remember it has to fit in with our living room furniture .  
 Person1:        That's right.Now this one looks alright ? It's a detached or do you prefer this one ? It's Sony .  
 Person2:Let's have the salesmen for a demonstration . 

formal