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: Consider Input: Person1: What is the weather like today ?
Person2:It stops snowing , but there's a bit wind .
Person1: And the streets are covered with ice . Do you know what the temperature is today ?
Person2:I missed today's weather for cast in the radio
Person1: It seems 10 degree below zero at least . I don't mind the cold weather , but do hate when it get slippery .
Person2:The ice is soon be thick for skating . I'm so fine to want a sport
Person1: That's fine . let's go skating together tomorrow .

Output: formal

Input: Consider Input: Person1: Well , humans could never make something like that .
Person2:Those poor Egyptians slaves worked so hard and you want to give aliens all the credit !
Person1: Be a little more open-minded , Stu ! Don't believe everything you read in your history books !
Person2:OK , but don't believe everything you see on The X-files , either !
Person1: Speaking of The X-files , it's on right now !

Output: informal

Input: Consider Input: Person1: Good morning . I ' m looking for a one-bedroom apartment downtown .
Person2:Certainly , sir . How much rent did you want to pay ?
Person1: Well , I didn ' t want to pay more than $ 520 a month .
Person2:$ 520 a month ? We don ' t often have apartments as inexpensive as that.We have one apartment for $ 599 a month , on Seventh Avenue . It ' s near the station .
Person1: Is it furnished ?
Person2:No . it ' s unfurnished . It has a kitchen , but no oven.There ' s a garden in the back , but the tenants can ' t use it.The landlord lives downstairs.Friends are forbidden in the apartment after midnight . No noise and no television after 11
Person1: No , thank you ! I want an apartment , not a prison .
Output: informal