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:       Well , everything is packed and ready to go . 
 Person2:It's hard to believe that we're really leaving . The past two weeks was like a dream . 
 Person1:        Yes . Just think the blue sky , sunshine , mouth-watering food , centuries-old castles - - 
 Person2:And the people were so friendly ! 
 Person1:        Yeah , we would have been lost without the help of the locals . 
 Person2:Do you still remember the small restaurant at the corner of the street ? 
 Person1:        Of course . That was the best pasta I've ever had . 
 Person2:I ate so much that I wasn't hungry until afternoon the next day . 
 Person1:        If only we could eat there once more ! 
 Person2:Maybe we can come here again next summer . 
 Person1:        Hope the restaurant is still there . 
 Person2:Hey , what's the time ? 
 Person1:        Oh , my god ! Only two hours left before the plane takes off . We need to be at the airport now . 
 Person2:Don't worry . We can call a cab . It'll be alright . 

informal