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'.

Ex Input:
Person1: Emily , are you getting rushed by a sorority ?
Person2:More than one . I think the count is now three , if I remember correctly .
Person1: Wow . I'm getting rushed too , but just one . Are you thinking of joining any of them ?
Person2:I don't know . I know there are advantages to joining , but I'm not much into group stuff .
Person1: The guys I've talked to say that the activities that go on in a frat house can be a little distracting depending on the group .
Person2:I think I'm going to decline . I just prefer to do my own thing .
Person1: Were your parents involved in that kind of thing at all when they went to school ?
Person2:My dad was , but not my mom .

Ex Output:
formal

Ex Input:
Person1: Did you hear about Neil ?
Person2:No , what ?
Person1: I hear that he's quitting .
Person2:You're kidding !
Person1: I'm afraid not ! Now this is just between you and me .

Ex Output:
informal

Ex Input:
Person1: Rebecca Johnson speaking .
Person2:I'd like to speak to someone in your Accounts Department , please .
Person1: Just a moment ... I'm afraid there's nobody there right now . Could I take a message ?
Person2:Yes , please . My name's Michael Caxton from one of your customers Rosedale Investments .
Person1: Sorry , just a moment . The name is Caxton ...
Person2:No , it's Caxton .
Person1: Fine , I've got that . And your company is ...
Person2:Rosedale Investments .
Person1: Could you spell that , please ?
Person2:It's R , O , S , E , D , A , L , E .
Person1: Thank you . And the message ?
Person2:It's about an invoice which is wrong .
Person1: Have you got the number there ?
Person2:Um ... yes ... it's 856674 / ros .
Person1: 856674 .
Person2:That's right .
Person1: OK , I'll get someone to phone you first thing in the morning .
Person2:Thank you very much .

Ex Output:
formal