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: I don't think we come here at a right time .
Person2:What's wrong ?
Person1: The museum doesn't open today .
Person2:What a pity !
Person1: Where shall we go now ?
Person2:Why not have a visit to the zoo ?
Example Output: informal

Example Input: Person1: Did you make it to school today ?
Person2:I always do . Did you go to school today ?
Person1: No , I didn't .
Person2:You should have , but have you seen any movies lately ?
Person1: That was an odd change of subject .
Person2:Maybe it was , but answer the question .
Person1: No , not recently .
Person2:I want to go to see a movie this weekend .
Person1: What's stopping you then ?
Person2:I don't want to go alone .
Person1: So , will you be at school tomorrow ?
Person2:No , I want to go to the movies instead .
Example Output: formal

Example Input: Person1: Welcome to our restaurant , Chez Attitude !
Person2:Our reservation is under the name of Foster at 7:00 for four people .
Person1: Yes , Mr . Foster , our hostess will be with you in just a moment .
Person2:We would like to begin with a cocktail while we are waiting . Would you tell the hostess to please come and let us know when our table is ready ?
Person1: I will let her know where you are .
Person2:The patio tables look really nice . Could we be seated there , please ?
Person1: I could seat you right away at an outside table if you would like .
Person2:Thanks ! We'll sit out there then . We will just order our drinks out there .
Person1: Well , can I start you off with some cocktails while you are looking over the menu ?
Person2:Yes , why don't you bring us a bottle of the house Chablis with four glasses to start with ?
Person1: I'll get on that right away !
Person2:We appreciate your help .
Example Output:
informal