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: David , I ' m going to China .
Person2:Really ? How do you get the chance ?
Person1: You know . I took part in the Chinese contest . I was the best and they gave me this reward . I don ' t have to pay for my trip .
Person2:Congratulations . How lucky you are !
Person1: Thank you . I ' m leaving tomorrow morning .
Person2:I ' m sure you ' ll enjoy the trip . China is such a beautiful country .
Person1: I ' m sure I will .
Person2:Have a nice journey , Lily .
Person1: Thank you , David .
[EX A]: informal

[EX Q]: Person1: Sam , we are hard up for the everyday expenses . When can you find a job .
Person2:I'm looking for it , but you see , the market is hard up for jobs , too .
Person1: You liar , I saw you again in the inn . I bet you don't want to work at all .
[EX A]: formal

[EX Q]: Person1: Who are we going to play with today ?
Person2:We are playing against Hainan .
Person1: Oh , the basketball team from No . 1 College ? I know they're a tough team .
Person2:Sure they are .
Person1: Who's winning ?
Person2:We are , 27 to 26 .
Person1: Really ? I thought that they'd been killing us by now .
Person2:How can it be ? We are a tough team as well .
[EX A]:
informal