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:       we'd like to rent a flat near the university .  
 Person2:are you looking for somewhere for two people ?  
 Person1:        yes , we are . obviously , we'd like something as cheap as possible . we've heard that there are places for 80 to 100 pounds a month .  
 Person2:yes , there are several place available in that price range near the university . do you have any other requirements ?  
 Person1:        net really , no . we'd preferably like to live in a quiet street .  
 Person2:how many rooms do you need in the flat ?  
 Person1:        we'll need two bedrooms . the kitchen and dining room can be separate or combined .  
 Person2:ok . i've got a list of place that fit your requirements . let's just go through them . the first on the list costs 80 pounds a month , but it's on a noisy street and it's a little far from t  
 Person1:        how far away is it from the campus ?  
 Person2:it's about two miles away . that might be a little far to walk . here's one that's about half a mile from the campus . the cost is 100 pounds a month and it's on a small street , just off a  
 Person1:        that sounds ideal . can we go to have a look at it ? we'd like to see it before making a final decision .  
 Person2:of course . i'm not very busy at the moment . if you can wait for about 15 or 20 minutes . i can take you there .  
 Person1:        thank you . that would be great . 

informal