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:       Which film shall we see ?  
 Person2:There is nothing good at the moment.Let ' s do something different.Would you like to go to a concert ?  
 Person1:        Yes , I'd love to.Here is a good one , Mozart and Beethoven.It ' s on the Festival Hall .  
 Person2:Fine ! Do you want anything to eat now ?  
 Person1:        No , I'm not hungry .  
 Person2:Well , let's go and have something to drink instead . I know a good place . It's a little expensive , but it's fun . 

informal