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: Thank you. I am also looking for a place to stay. I am specifically look for a four star hotel. Sentence2: Yes to the hotel from the restaurant. I need to leave by 7:30 and will need the car type and a contact number please. Sentence3: We have finches bed and breakfast, also in the west with complimentary internet, as well as four stars. Would you like me to book this for you? Sentence4: Yes I found five restaurants in the west four in the expensive range and one in the moderate price range. Sentence5: There are several Indian restaurants in the west, would you prefer a more expensive price range or moderate? Sentence6: The tandoori palace is a restaurant in the expensive price range located at 68 histon road chesterton. The phone number is 01223506055. Is there anything else I can assist you with? Sentence7: Can you give me the address, price range, and phone number of the best one? Sentence8: Not necessarily I just needed to be a guest house with free Wi-Fi Sentence9: I need a taxi to travel between the two places. I need to leave tandoori by 07:30. Can you suggest something for me? I need contact number and car type. Sentence10: Either price range is fine, can you tell me more about some of the restaurants you mentioned? Sentence11: I am looking for a restaurant in Cambridge that serves Turkish food and is located in the west. Sentence12: is there a restaurant serving indian food? Sentence13: You are welcome. Have a great day. Sentence14: Thank you so much for your assistance today I think that will be all. Sentence15: I would be happy to help with finding a taxi. Can I ask where you will be traveling too? That way we can find the best taxi company for you! Sentence16: Booking was successful. Reference number is : QKZSOURZ .. Anything else today? Sentence17: I am showing 21 hotels with a four star rating. Would you also like a hotel that is in the west? Sentence18: Please book it for 6 people and 5 nights starting from sunday. Sentence19: I have booked a black Skoda for you at 7:30 at the restaurant. The contact number is 07889958021. Sentence20: I'm sorry, but there are no restaurants that fit those criteria. Would you like me search in another area, or for a different type of food? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System