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:       Come and sit down . Would you like a drink ?  
 Person2:Oh , yes please ! I'd love a gin and tonic .  
 Person1:        Do you like olives ? Or would you prefer crisps ?  
 Person2:Oh , just olives please . What music is this ?  
 Person1:        Do you like it ? It's Irish music .  
 Person2:It's great ! Where did you get the CD ?  
 Person1:        Arm - I think it was in the CD shop in the Mall . Have you been there ?  
 Person2:Yes . I buy a lot of stuff from there . It's a good shop , isn't it ?  
 Person1:        Yes . Hey , I've got some photos of our holiday in Ireland . Would you like to see them ?  
 Person2:Why not ? I'd love to ! 

informal