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:       Good morning . Welcome to Time After Time Watches .  
 Person2:I'd like to buy a watch .  
 Person1:        Well , you've come to the right place . What kind of watch are you looking for ?  
 Person2:Well , I'm not sure . Let's see . How much is this one ?  
 Person1:        Hmm ... This Rolex ? $ 1,000 .  
 Person2:Oh . I don't think I can afford that . How about this one ?  
 Person1:        This one is $ 500 .  
 Person2:Wow . That's too much for me . Don't you have anything cheaper ? 

formal