instruction:
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'.
question:
Person1: Excuse me , can you recommend some places for us to go tonight ?
Person2:Since it's your first time to Vienna , I think you should go to the concert .
Person1: Good idea . My wife has a fine ear for music . I am sure she would like it .
Person2:Have a nice evening .
answer:
formal

question:
Person1: Wake up sleepyhead.The sun is beginning to shine . What a lovely summer day !
Person2:Yeah , clearly blue sky.But it is a bit too hot for me . I don't like heat and humidity .
Person1: It's not that hot . It's cooler than yesterday . Let's go swimming !
Person2:That's a thought . It's still early , and the beach isn't crowded at this time of the day . If we don't stay too long , we won't get sunburned .
Person1: Yeah , sounds like fun . I can wear my new pink bikini .
Person2:There won't be anyone there to appreciate how cute you are .
Person1: Who cares ! Well , the smart guys get there early . That's the kind of guy I want to meet . Let's go !
Person2:If you are going to husband hunting in a bikini , then I want to wear one , too .
Person1: Ok , you could borrow one of mine .
Person2:Thanks , how about the green and black one ?
Person1: No problem . Here it is .
answer:
informal

question:
Person1: That was a great dinner . I didn't know that you knew how yo cook .
Person2:I'm glad you liked it . Are you ready for dessert ?
Person1: I don't know . I'm pretty full . What are we having ?
Person2:I made strawberry shortcake .
Person1: Ooh , that's my favorite . Maybe I'll have a small slice .
Person2:Great . Would you like coffee or tea with that ?
Person1: I'll have a cup of tea .
Person2:Do you take cream or sugar with your tea ?
Person1: Actually , could I have some milk with that ?
Person2:Definitely . Would you like skim or whole milk ?
Person1: Skim , please . That'd be very nice . Thanks ... oh no . Janna , I'm so sorry , but I've got to go .
Person2:What happened ?
Person1: I just got a message from my sister saying that she's been in a car accident . I need to go pick her up .
Person2:I'll go with you . Where is she ?
Person1: She's on the M40 , near Reading .
Person2:Is she alright ?
Person1: I don't know , she didn't say . I'm so sorry about this .
Person2:Don't worry . Family comes first . Come on , let's go .
Person1: Actually , I've only got a two-seater . I'll have to go on my own .
Person2:Ok . Just call me if you need anything then .
Person1: I will . Thanks a lot .
answer:
informal