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 Q]: Person1: Happy New Year , Bill .
Person2:Happy New Year , Steven .
Person1: Do you have any plans for the New Year holiday ?
Person2:My whole family are going to Hainan for visiting . What about you ?
Person1: How happy you are ! I have to stay at home to prepare my final exam .
[EX A]: informal

[EX Q]: Person1: Hey , Zina . You're here early today .
Person2:Yeah , I'm going to be making phone calls all day . What a blast .
Person1: I just wanted to say thanks for putting us on the map so fast . I appreciate it .
Person2:Save it , Vince . After I put my first million in the bank , I'll say you're welcome .
Person1: Fair enough.Keep up the good work .
[EX A]: informal

[EX Q]: Person1: Who got ripped off ?
Person2:Big time ! A hacker broke into the company's files and got all her personal information . You really think it's completely safe ?
Person1: Well , maybe not 100 percent . I did hear about some tricks people use .
Person2:Now we're getting to the truth .
Person1: There are shills . A shill is someone who bids up the price of their own sale .
Person2:See ? And I bet that's easy to do online . Everybody's anonymous .
[EX A]:
informal