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: Mrs . Schmidt ! What's happening !
Person2:You'll never guess what happened today ! I went to the doctor after work and the doctor told me ...
Person1: And the doctor told you to start listening to Bach ?
Person2:No ... He told me I'm pregnant !
Person1: Congratulations !
Person2:And so I bought all these books on having kids and ...
Person1: And they said you should play classical music ?
Person2:How did you know ! They say listening to classical music can make your baby smarter !
informal