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'.

[EX Q]:  Person1:       Excuse me . What time does the next train to London leave ? 
 Person2:At 10:30 . 
 Person1:        Is it a direct train to London ? 
 Person2:Yes , it is . 
 Person1:        OK . Two tickets to London , please . 
 Person2:Single or return ? 
 Person1:        Single , please . How much in total ? 
 Person2:10 pounds . 
 Person1:        Here you are . Which platform should I go to wait for the train ? 
 Person2:It's platform 5 . 
 Person1:        OK . Thank you . 
 Person2:You are welcome . 
[EX A]: informal

[EX Q]:  Person1:       I am not sure what to do to get ready for my job interview .  
 Person2:Make sure that you understand the company . Do you understand what it is that they do ?  
 Person1:        No , I probably need to do some more research .  
 Person2:When you've finished your research it will help you figure out whether your company is rigid in philosophy or kind of more relaxed . Does that make sense ?  
 Person1:        I think that their attitude is rather casual .  
 Person2:So all of that information will help you to pick out what to wear . Do you have something to wear ?  
 Person1:        I have absolutely nothing so far .  
 Person2:You know I could go shopping with you sometime if you need it , but can we talk about other basics ?  
 Person1:        Yes , where should we go from here ?  
 Person2:Focus on being relaxed and open , don't forget to smile and shake hands and be genuinely interested in what their company is about . I'm sure you'll do well . 
[EX A]: formal

[EX Q]:  Person1:       Are you interested in mountaineering ?  
 Person2:Yes . in some sense . I should say I like mountain climbing , you know , because I'm not so professional . How about you ?  
 Person1:        I'm the same with you , an amateur mountain climber . 1 went climbing in the Rocky Mountains with my friends last summer vacation . We spent two days in the mountains .  
 Person2:How did you spend the night there ?  
 Person1:        We pitched a tent in the night , waiting for the sunrise . Wow ! It was too beautiful .  
 Person2:I had a similar experience , but that was on the top of Tasha Mountain in my country .  
 Person1:        Tasha Mountain ? It's very famous in China , isn't it ?  
 Person2:Yes.It IS one of the Five Mountains .  
 Person1:        I want to climb Tasha Mountain this summer vacation . Would you be my guide ?  
 Person2:I'd love to . 
[EX A]:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
informal

