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: I don't care as long as it's a guesthouse located in the north for cheap. Sentence2: You are welcome! Enjoy your time here. Sentence3: I'm sorry, there are no Swiss restaurants in the north side of town. Is there a different food choice you would like to try? Sentence4: We have 9 guesthouses that match your search. Would you like to narrow it down? Sentence5: Can you try booking again for 3 nights instead of 4? Sentence6: Sure expect a grey Volkswagen to pick you up and the contact number is 07554509101. Is there anything else I can help you with today? Sentence7: I'm sorry. It looks like the guesthouse can't be booked for your stay. There's a 0 star guesthouse also in the north. Would you like me to look there? Sentence8: Thank you, please provide the address and the postcode. Sentence9: May i suggest the Worth House? It is a cheap, 4 star hotel in northern Cambridge. Sentence10: Your booking for 3 nights was a success! Your reference number is KLPEPNED . Is there anything else I can help you with? Sentence11: Thank you. I would also like to book a taxi to get from the guesthouse to the restaurant. I would like to arrive by 17:30. Sentence12: How about the Royal Spice, it's a cheap Indian place in the north part of town. Sentence13: What is the maximum passenger accommodation of the Volkswagen? There will be 7 of us going to dinner. Sentence14: Thank you. Are there any cheap restaurants near the hotel as well? Sentence15: Yes. This restaurant should serve swiss food too. Sentence16: Yes, I'm looking to stay at a guesthouse while I'm in town. I don't need internet access, so don't worry about that. Sentence17: Sounds like a plan. Thank you for all of the help! Sentence18: I see. Hmm. What about Indian? Sentence19: Just to clarify, are you looking for a cheap restaurant in the north area of town? Sentence20: That's fine. Can I book it on monday for 4 nights for 7 people? Sentence21: I need something cheaply priced. Sentence22: Yes I would like a contact number and car type please for my booking. Sentence23: The model of the car was not given, so I am not sure, your best bet is to call the taxi company to make sure the vehicle can fit 7 passengers. Sentence24: The alpha-milton guest house is in the north and moderately priced. Would you like to book a stay? Sentence25: Ok, I've booked your taxi from Worth House to Royal Spice. You will arrive by 17:30. Anything else I can do for you? Sentence26: No problem, address is Victoria Avenue Chesterton, postcode cb41eh. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System