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: What's their address and star rating? And do they have free parking? Sentence2: OK, and how can I help you? Sentence3: Yes I would like to stay in an expensive hotel in the city center. Sentence4: Your train is booked. Total fee is 76.8 GBP payable at the station. Reference number: L9XGQW87 Sentence5: I am planning a trip in Cambridge. Sentence6: University Arms is available. Sentence7: They do have parking. They are on Regent Street. Can I help you with anything else? Sentence8: What day would you like to leave? Sentence9: University Arms Hotel Star rating is 4. Should i go ahead and book that for you? Sentence10: I found you the TR8290 that leaves at 09:21 on monday arriving at 10:10. Would you like to book this one? Sentence11: arriving at 10:10 is fine.can i get six tickets? Sentence12: Excellent, thanks. Sentence13: I need to find a hotel in Cambridge. Sentence14: no, thanks. does it have free parking and what's the address Sentence15: Great, thank you! I won't be needing anything else! Bye! Sentence16: I need to leave on a Monday please. Sentence17: Let me find one for you. Sentence18: That is the closest train we have to 10:30 Sentence19: Any particular location or price range? Sentence20: Have a wonderful time in town. I am glad to help you from Cambridge TownInfo Centre. Goodbye. Sentence21: I need to book a train for 6 people departing at Cambridge and arriving at Stevenage at 10:30. Sentence22: I need it to arrive at 10:30 actually. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System