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'.

Example Input: Person1: Paul , let's go and see Grandpa this afternoon .
Person2:But Grandpa will be working .
Person1: It's Saturday .
Person2:I almost forget .
Example Output: informal

Example Input: Person1: I ' Ve got this really neat idea , you can hire a car and drive straight there .
Person2:Are you nuts ? What would my friends think if they see me in a hired car ?
Person1: But that ' s the quickest way to make your plans work .
Person2:Oh this is hard ! Well , I ' ll see what I can do .
Example Output: informal

Example 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 .
Example Output:
formal