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'.

Person1: Hi , Monica , I got big news .
Person2:You got a raise ?
Person1: Not really , just take a wild guess .
Person2:You got promoted ?
Person1: Well , it is not going to happen so soon , I guess .
Person2:You won a lottery ? Don ' t beat around the bush , just tell me , please .
Person1: Ok , I lost 5 pounds .
formal