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:       I've never been to a restaurant like this before .  
 Person2:It's really different , isn't it ?  
 Person1:        That's a good word to describe it .  
 Person2:I hope you're hungry because the pizza here is huge as well as to die for .  
 Person1:        I am hungry . I think I could eat a large by myself .  
 Person2:Well , let's order one for starters .  
 Person1:        I'm in the mood for a Californian .  
 Person2:That happens to be my favorite . Waiter , I think we're ready to order . 

informal