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:       Are you satisfied with the dishes ? 
 Person2:Great , the lamb stew tastes incredible . 
 Person1:        I like it , too . I like the fish especially . It's so fresh , and the flavoury is kind of like for a fresh water fish . 
 Person2:Yes , the food here deserves its reputation . Chinese food is one of my favorites 。 
 Person1:        If you like , I'll take you to a new restaurant next time , I just heard about it from my friend , and he was just raving about it . It's such a great Sichuan cuisine . Would you like to try that ? 
 Person2:Sure , I'd love to . I heard Sichuan cuisine is very hot , I think I definitely love it . 
 Person1:        Great , I love hot food too . 
 Person2:Well , let's finish this great dinner first . 
 Person1:        You said it . 

informal