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: 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: Come on , fellows.Let ' s enjoy my wife's cooking !
Person2:Em , it's delicious !
Person1: Thank you ! My wife likes cooking very much .
Person2:You're lucky .

Ex Output:
informal

Ex Input:
Person1: How would you describe your ideal job ?
Person2:I think the job should make use of the professional experience I have obtained , and offer me opportunity for advancement .
Person1: Why do you think you might like to work for our company ?
Person2:I feel my background and experience are a good fit for this position and I am very interested.What ' s more , your company is outstanding in this field .
Person1: What makes you think you would be a success in this position ?
Person2:My graduate school training combined with my experience as an intern should qualify me for this particular job . I am sure I will be successful .
Person1: How do you know about this company ?
Person2:Your company is very reputed in this city . I heard much praise to your company .

Ex Output:
formal