Instructions: 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'.
Input: Person1: May I see your passport please ?
Person2:Yes . Here it is .
Person1: Are you travelling for business or pleasure ?
Person2:I'm going to visit some relatives here for several months .
Person1: Do you have anything to declare ? Jewellery or cash ?
Person2:The only things I brought were some cloths and my notebook computer .
Person1: Did you bring any fruits , vegetables , fresh meats or plants into this country ?
Person2:No , Sir , I did not .
Output:
formal