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'.
Input:  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 . 

informal