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:       You know that this job requires frequent business travel . Can you accept it ?  
 Person2:Yes , I can .  
 Person1:        Mostly short business trips , but sometimes long ones are also needed .  
 Person2:Then how about the expenses during the trips ?  
 Person1:        The company will pay all the expenses .  
 Person2:Would you tell me where we often travel ?  
 Person1:        Usually Shanghai , Qingdao , Hong Kong and so on .  
 Person2:It's great ! I like these places .  
 Person1:        And you need to go abroad once in a while . Can you ?  
 Person2:Yes , I can .  
 Person1:        After the business trip , you could apply for reimbursement of all the expenses , such as passage money and accommodation charges and so on .  
 Person2:I see .  
 Person1:        You can take a break for one or two weeks after you have a business trip every time , which depends on the circumstances .  
 Person2:OK . Thank you very much for telling me all these things . 

informal