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:       A table for two , please .  
 Person2:All right . How about this one by the window ?  
 Person1:        Thank you . It's fine .  
 Person2:May I take your order now , sir ?  
 Person1:        What do you recommend ? We'd like some of your local specialities .  
 Person2:Our restaurant is famous for its seafood .  
 Person1:        One cream of fish soup and two portions of prawns .  
 Person2:Shrimp salad is our speciality , took  
 Person1:        No , I think it's enough .  
 Person2:What would you like to drink ?  
 Person1:        A juice and a coke . 

formal