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: TR5212 will arrive at London Liverpool Street at 19:27. It leaves Cambridge at 17:59, and the travel time is 88 minutes. Would you like a ticket? Sentence2: I would like to leave from Cambridge and with my destination being London Liverpool Street. Thank you for your help with this. Sentence3: In the North, if possible. Sentence4: Glad I could help, have a great trip! Sentence5: There are several trains that day. Could you tell me where you are departing from and arriving to, as well as a time you would like to leave? Sentence6: Yes the information for Hakka, 24 Milton Road Cambridge Cambridgeshire, +44 1223 568988. Would you like me to go ahead and book your table and for what time? Sentence7: The Hotpot and Hakka are both in the North. Would you like to book a table at one of these? Sentence8: Thank you, that will be all I need today. Sentence9: Can you help me find an expensive restaurant that serves Chinese food to dine at? Thanks. Sentence10: Not quite yet. But can you help me find a train fro Friday, arriving by 21:15? Sentence11: I have booked your 8 seats here is the information:Booking was successful, the total fee is 132.8 GBP payable at the station . Reference number is : WOEHJGD9 . Sentence12: Can I get the address and phone number of Hakka? Sentence13: I need 8 tickets, please. And could I get the reference number after you book them? Thanks. Sentence14: There are 9 expensive Chinese restaurants in Cambridge. Which area of town do you prefer? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System