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 like hitchhiking.will you go with me ?
Person2:Oh , no . I don't think I'm in that good form .
Person1: It's a pity.Say , how about a place near enough ?
Person2:To where exactly ?
Person1: New England .
Person2:That's still too far for me .
Example Output: formal

Example Input: Person1: Please excuse me , but I really have to be going .
Person2:Yes , of course.It was nice to see you .
Person1: It was nice to see you , too.And please give my regards to Mrs.Robbins .
Example Output: informal

Example Input: Person1: When is your vacation going to start ?
Person2:I'll be leaving on the fifth of August for the vacation
Person1: Oh , that's only a few days from now ! How many weeks are you going to be taking ?
Person2:I'm taking two weeks now . but I want to save the other week and take it sometime during the winter .
Person1: Where are you going now .
Person2:To the beach
Person1: Have you made your hotel reservation yet ?
Person2:Oh , I don't need to do that . I'll be staying with friends
Person1: You're lucky . It's hard to find a place to stay at the beach in August
Person2:Just think , in a few days , I'll be swimming and lying in the sun and just taking it easy .
Example Output:
informal