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: When in Rome , do as the Romans do , they say .
Person2:What do the Romans do ?
Person1: They live in Rome , of course , and go to work by car or bus . But sometimes it takes too long that way because of the traffic jams , so they walk .
Person2:In other words , the Romans do what everyone else does .
Person1: Yes , but they do it differently . Everything is different .
Person2:What do you mean ?
Person1: Well , the climate's different for a start . It doesn't rain so much as it does in England . The sun shines more often .
Person2:I envy them the sun .
Person1: I know . You hate the rain , don't you ?
Person2:I certainly do .
Person1: And a Roman really Ioves life . Eye knows how to enjoy himself .
Person2:They always eat spaghetti and drink wine , don't they ?
Person1: Not always . But they like a good meal . Lots of tourists go to Rome just for the food , you know .
Person2:Really ? How much does it cost to fly to Rome ?
Person1: I don't know exactly , but it costs a lot of money .
Example Output: informal

Example Input: Person1: Hello . I would like to buy some business cards .
Person2:Excellent . How many would you like ?
Person1: Two thousand would be fine .
Person2:You need to fill out this form , please .
Person1: All I want is the same thing on this card .
Person2:That will be no problem , sir .
Person1: ... Okay , I'm finished . Here's your form and my old card .
Person2:Very good , sir . Your order will be ready in one week .
Person1: Do you think you could finish it in three days ?
Person2:No problem , sir . But it will cost you extra .
Example Output: informal

Example Input: Person1: Could you tell me what university you want to go to , John ?
Person2:Pardon ?
Person1: What university would you enter ?
Person2:University ? Why ? You asked me last year .
Person1: Oh , I forget.Sorry .
Person2:I went to Harvard University .
Person1: Did you ? And what course did you take there ?
Person2:God save me ! Is there anything wrong with you ? Didn't I tell you ?
Person1: I've not known.Perhaps , I've got a bad memory .
Person2:I did a B . A . in economics.Remember ?
Person1: Terrific ! B . A . , again and again-B . A .
Example Output:
informal