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'.

Example Input: Person1: I Don't know how they do it ! Our competitors have undercut us by 10 % percent on the price of our latest model . There is no way will be able to compete against that . We're barely breaking even with the present prices .
Person2:These price wars are disastrous for our bottom line . If they're charging 10 % less than we are , we've got to find a way to lower our price while keeping our profit .
Person1: Profits are almost nonexistent now , we can't beat their price . How do they keep their price so low ?
Person2:We can try to lower our cost of production then . We need a price that we can compete with , something comparable with the competition .
Person1: You really think we can make it ? I don't have much faith in our ability to lower the price again . We're no match for them , the competition will beat us hands down .
Example Output: formal

Example Input: Person1: How are you getting along with your paper ?
Person2:I haven't finished it . It is very difficult .
Person1: You should hand it in before next Sunday .
Person2:Oh , I know . I will try my best .
Person1: I believe you can do a good job .
Example Output: formal

Example Input: Person1: What's your hobby ?
Person2:Photograph .
Person1: What's the make of your camera ?
Person2:Olympus .
Person1: Do you own your own darkroom ?
Person2:No , usually I get my films developed at a photo studio , but I make my own enlargements .
Person1: Why ?
Person2:Because I can make many different kinds of pictures from one negative . That's more , but that saves money .
Example Output:
formal