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'.

[Q]: Person1: Hi , charlie , are you busy this evening ?
Person2:Sorry , I'm afraid that I've got plans tonight .
Person1: What are you doing ?
Person2:I'm going to my parents ' house for my father's birthday .
Person1: How old is he today ?
Person2:It's his 50th birthday .
Person1: Well , wish him a happy birthday for me .
Person2:Sure thing . What are your plans for the evening ?
Person1: I was just thinking of going to a movie tonight .
Person2:Well , if you can wait until tomorrow night , I'll go with you then .
Person1: Sorry , I've got people coming over tomorrow night .
Person2:Sounds like this weekend just isn't going to work out for us .
Person1: Sounds that way . Maybe some other time then ?
Person2:Sure.Hey , I'm sorry , but I've got to get going .
Person1: Yeah , me , too . It's about time I made a move .
Person2:Say hello to your friends for me .
Person1: Likewise . See you later .
Person2:Bye !
[A]: informal

[Q]: Person1: Well , I've got a date . Now I need to find a restaurant . Can you help me ?
Person2:No problem , of course ! How much would you like to spend to impress the lady ?
Person1: Nothing but the best for a pretty woman !
Person2:Sir , the restaurant you seek is right here . This hotel has a three-star restaurant .
Person1: Well , I sort of suggested that we would go out on the town . Do you have another suggestion ?
Person2:Gramercy Tavern is at least as good as our own hotel restaurant . Plus , they have live jazz .
Person1: Gramercy Tavern , eh ? I think I've heard of that before . Call to get us a table , okay ?
Person2:Right away , sir . She will be impressed with your local knowledge .
[A]: formal

[Q]: Person1: I hear that you've been to the Saikei Ski Resort for the weekend . Did you enjoy it ?
Person2:Yes , it's so exciting , though I had the most falls in our skiing team .
Person1: Isn't there any coach to teach you how to ski ?
Person2:Of course there is . The top-level coaches there are from the State Sports General Administration .
Person1: Could you move smoothly ?
Person2:Yes.My face even ached in the icy wind .
Person1: What happened afterwards ?
Person2:I was skiing on and on excitedly until I realized one thing-I could not stop ! You can just imagine how terrified I was .
Person1: Poor girl !
[A]:
informal