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: Done! Your table will be reserved for 15 minutes. The reference number is 1T0DI06Z . Can I help you with anything else? Sentence2: Hmm, I really want to stay near the hotel. Do you have anything in the south instead? Sentence3: I would prefer to stay in the South please. Sentence4: I want to eat at 16:15. Sentence5: It will be a black Honda. Is there anything else I can help you with today? Sentence6: No. That is all I need for today. Sentence7: There's one guesthouse, el shaddai, that fits your criteria. Do you need more information? Sentence8: No, but I do need a reservation for Wednesday, 2 nights, for 3 people. Sentence9: Oh yeah, I'm going to need a ride to get around. Sentence10: Thank you, what kind of car will be picking me up? Sentence11: Booking was successful. Reference number is : LG6AFLVA . Sentence12: Yes I can. What time would you like to eat? Sentence13: In the south we do not have any expensive british restaurants. We do have chinese, indian, italian or mexican. Sentence14: That sounds wonderful! Is it in the same area as the hotel? Sentence15: I've changed my mind and would prefer to stay in the center of town. I need parking, wifi, and it should have a 0 star rating. Sentence16: Yes! What part of town would you like to stay in? Sentence17: Thanks. Could you also help me locate an expensive british restaurant? Sentence18: There are 4 nice places to stay in that area, is there a price range you prefer? Sentence19: I have booked you a taxi to take from your hotel to The Cambridge Chop House. Contact number : 07124495603 Sentence20: The Cambridge Chop House sounds like it might be what you are looking for. Sentence21: My hotel is in the centre, so the Cambridge Chop House will actually work. Can you make me a booking for 3 people on Wednesday? Sentence22: Thank you for calling. I hope you enjoy your trip. Goodbye! Sentence23: Your hotel is in the south and the cambridge chop house is in the centre, is that okay? Sentence24: Can you help me find a place to stay? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System