You will be given a definition of a task first, then some input of the task.
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: How do you usually part your hair ?
Person2:To the right .
Person1: ( The hair stylist cuts the customer's hair . ) Almost done . I just have to even things up a bit . ( She shows the customer the results . ) Will that do ?
Person2:Looks good .
Person1: Would you like a shave ?
Person2:No , thanks .
Person1: Okay , let me brush you off . Thank you very much for coming .
Person2:Thank you .
Output:
informal