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'.

Ex 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 .

Ex Output:
informal

Ex Input:
Person1: The weather in Beijing is just beautiful !
Person2:Autumn is the best season in Beijing , you know .
Person1: Yes , I can see . The summer heat is over , and the winter cold is still far away .
Person2:What is the weather like in Washington at this time of this year ?
Person1: Autumn is also very nice in Washington .
Person2:Is it very cold in winter there ?
Person1: No , it isn't . But sometimes it snows a lot in winter .
Person2:Does it rain a lot in summer there ?
Person1: Oh yes ! Sometimes it rains very heavily.How about here in Beijing ?
Person2:There's a lot of rain in summer , but it seldom rains in autumn .
Person1: I feel it's rather dry here .
Person2:That's true . Many people from the south don't like the weather here .
Person1: Are you from the south ?
Person2:No , I'm from the north . I was born in Beijing , actually .
Person1: I see.so this is your hometown ?

Ex Output:
informal

Ex Input:
Person1: How have you been ?
Person2:Fine , thank you .
Person1: And how's everyone in your family ?
Person2:Very well , thank you . I'm meeting my wife and daughter for lunch at twelve.Would you care to join us ?
Person1: I'd love to , but I'm afraid I can't .

Ex Output:
informal