Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: TR0254 arrives 18:10. Want to book? Sentence2: Do you have a price range or area preference? Sentence3: Great thanks. So what time do I need to be at the Cambridge station? Sentence4: Sure. Hobsons House is a guest house in the west with moderate pricing and internet. Do you need any additional information? Sentence5: One in the west, would be best. Sentence6: sure, the travel time for the train is as follows; departure 17:21 arrival 18:10 Sentence7: Can you help me find a train departing from cambridge going to stevenage? Sentence8: What price range would you like? Sentence9: sure when are you planning your stay so I can book the room for you Sentence10: Could you tell me the cost of the train ticket? Sentence11: Just one other thing. Can you clarify the travel time for the train? I need to make sure I am prepared. TR0254 I believe. Sentence12: sure, what day will you be travelling? Sentence13: You need to be at the Cambridge station at 17:21. Sentence14: I do not need it to be booked. Can I just get the postcode and whether it has internet? Sentence15: Yes, hobsons house does have a 3 star rating. It is located at 96 barton road and their phone number is 01223304906. Do you need anything else today? Sentence16: Thank you very much. Could you help me get a guesthouse as well? Sentence17: Yes, does the guesthouse have a star rating of 3? Sentence18: The cost is 12.80 pounds. Sentence19: I would like something in the moderate price range. Sentence20: I will be travelling on Monday and need to arrive by 18:45. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User