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 about the price range. Can you just pick a good one for me? Sentence2: Sadly there are no restaurants anywhere in Cambridge that describe their food as "creative." We do have many restaurants in town, though, so I'd be happy to look for something else. Sentence3: That booking was successful. A reservation was made for 6 people at HK Fusion on Saturday at 11:15. Reference is ARWFXLDL . Can I help with anything else? Sentence4: Yes, sounds good. Please reserve a table for six at 12:15 on Saturday. Sentence5: You're very welcome. Thanks for using our service. Sentence6: Hi, I would like a restaurant inthe centre of town which serves creative food please. Sentence7: Nothing else. I look forward to the meal. Thank you for all your help. Sentence8: There are 10 Chinese restaurants in the centre of town. Is there a specific price range you would like? Sentence9: Is 11:15 on Saturday available? Sentence10: How about a restaurant that services Chinese food? Sentence11: That was unsuccessful. Would you like another day or time slot? Sentence12: If money is no concern, I would definitely recommend HK Fusion. It's in the centre of town and expensive. It's located at 21 Burleigh Street, City Centre. How does that sound? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System