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:       Ashley , what a great dinner party !  
 Person2:Thank you , Joe . What would you like to drink with your meal ? I can offer you wine , mango juice , or water .  
 Person1:        Just water would be fine .  
 Person2:Excellent choice . Can I dish you up some chicken ?  
 Person1:        Yes , the chicken looks wonderful !  
 Person2:How about some salad to go with your chicken ?  
 Person1:        Sure , I love salad !  
 Person2:Would you like to have rice with your chicken ?  
 Person1:        Yes , I think that rice will go perfectly with my chicken !  
 Person2:Good ! Julie , if you could pass this plate down to Joe , I think we are all set . 

informal