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'.

Person1: He got the scholarship to Harvard .
Person2:You're kidding !
Person1: It's true . He is a hard worker .
Person2:I know he really deserves this .
informal

Person1: When can we expect you for dinner ? Can you come tonight ?
Person2:Not tonight . I promised to go to a concert with my sister .
Person1: Well ... How about Friday then ?
Person2:That sounds fine .
Person1: Good . Shall we say seven o'clock ?
Person2:I'll be there . You're still a fabulous cook , aren't you ?
Person1: That'll be for you to decide . I've got a new dish that I want to try out on you .
Person2:I'm ready . I'll look forward to it all Friday !
informal

Person1: I'm sorry , Sam . I don't want to go to the folk concert .
Person2:How about going to the theatre ?
Person1: I don't like going to the theatre .
Person2:Well , what do you like doing ?
Person1: Travelling , swimming , going to the cinema . And you ?
Person2:I like painting , sailing , watching football and talking to you .
Person1: I like talking to you , too .
Person2:Do you want to go to an exhibition ? There is one at the Xinghai Exhibition Hall tomorrow .
Person1: That's a good idea .
informal