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'.
Q: Person1: Do you mind helping me ?
Person2:What can I help you with ?
Person1: I'm not sure how to find my next class .
Person2:Do you know what building that it's in ?
Person1: The C building , I think .
Person2:Well , that's not far away .
Person1: Could you point me in that direction ?
Person2:Do you know what the room number is ?
Person1: It's C261 .
Person2:My next class is around there .
Person1: Can you show it to me ?
Person2:Sure , let's go .
A:
formal