TASK DEFINITION: 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'.
PROBLEM: Person1: You just ran a red light .
Person2:Did I ?

SOLUTION: formal

PROBLEM: Person1: It seems like it rains every time we plan a picnic .
Person2:Well , that's life .

SOLUTION: informal

PROBLEM: Person1: Judy , have you ever made out how much money shall we spend ?
Person2:Oh , yeah . The total amount is no less than 13,000 RIB , according to our itinerary .
Person1: What ? That's too much .
Person2:Sit down . I'll show you the list of our financial budget . First of all , it is nearly 4,000 RIB that we should spend in transportation .
Person1: Ah , the transportation fee always takes a great part in the budget .
Person2:Then we must pay a large amount of money for the hotel . But if we want to save money , we can choose a hotel which is not so good .
Person1: Hmm , what I'm fearful of is that the accommodation will also deteriorate once we choose a cheaper hotel .
Person2:In that case , we can choose the Youth Hotel . It's a good choice , clean and economic .

SOLUTION:
informal