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: How about yu garden? It's expensive and serves chinese food. Sentence2: For 14:00, Booking was successful. The table will be reserved for 15 minutes. Reference number is : NHCRN6DS . Sentence3: I'm planning to visit Cambridge and would like to know the options available for upscale Chinese dining. Sentence4: The Alexander Bed and Breakfast is cheap and in the centre. The postcode is cb12de. To book, I need to know when you'll stay and how many people. Sentence5: That's all I need for now. thanks! Sentence6: Thanks. I'm also looking for a guesthouse that includes free wifi and free parking. Sentence7: No, any price range is fine. Go ahead and book, and get me the postcode. Sentence8: That should be fine. Can you get the reference number? Sentence9: Any part of town will be fine. Sentence10: There are 21 guesthouses that offer those amenities. Do you have a preferred price range? Sentence11: I have several recomendations. Would you care to try Yu Garden? It has great Chinese food, but is expensive. Sentence12: I don't mind an expensive restaurant so that will be fine. I would like to reserve a table for 3 on Sunday at 15:00. Sentence13: Unfortunately there are no reservations left at that time. Would you like to change the restaurant? Sentence14: Do you have reservations for 14:00 for Yu Garden since the 15:00 is full? Sentence15: Certainly. What area of town do you prefer? Sentence16: Great! Thanks for using Cambridge TownInfo. Goodbye! Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User