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: There are 17 Chinese restaurants in town. What area of town are you interested in and what is your pricerange? Sentence2: Can you find me a Chinese restaurant? Sentence3: Thanks a lot. I would also like for some places to go in town, how about a museum in the same area? Sentence4: You are welcome. Have a nice day. Bye. Sentence5: You are booked for charlie chan for Saturday at 11:15. Reference number is 77TIE1S5 . Sentence6: The address is university of cambridge, downing street. The postcode is cb23dz and the phone number is 01223333516. Is there anything else I can help you with? Sentence7: We have 11 museums in the town centre. I enjoy the museum of archaelogy and anthropology. Would you like information on it? Sentence8: Please! Can you also provide the address with postcode and the phone number? I'd like to jot it down in case I get lost! Sentence9: No, that will be all. Thank you! Sentence10: I would like for it to be in the centre. Price does not matter. I need a reservation for 8 at 11:15 on Saturday. Reference number after booking is complete. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User