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: the postal code is cb39lh Sentence2: Okay, how about just moderate price and three stars in any part of town? Sentence3: They are in the centre, admission is free, can I assist with anything else? Sentence4: I am also looking for Williams Art and Antiques. Can you tell me what area that is in? Sentence5: Thank you for calling. Enjoy your trip! Goodbye. Sentence6: Is it in the moderate price range? I need a hotel in the west with a star rating of a 3. Sentence7: No, I think that's it. Thank you very much! Sentence8: Hi, I'm looking for information, specifically, a place to stay while I'm in town. Sentence9: We don't have any 3 star hotels on the west part of town. Do you want to try searching for something else? Sentence10: sure! how about allenbell? i hear it's lovely. Sentence11: okay, pick the west please. I need the postcode. Sentence12: There aren't any hotels like that, but I do have 4 guesthouses. 2 in the north, 1 in the west, and 1 in the south. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User