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: La Margherita is perfect for me, please book me a table at that one. Sentence2: I also would like to find an italian restaurant to eat at in the west. Sentence3: Okay, Thank You. Goodbye. Sentence4: What day and time would you like the table at La Margherita? Sentence5: The one arriving at 10:43. I just need 1 ticket and a reference number please. Sentence6: The booking was successful . Your reservation number is C9SBUT9T . Is there anything else I can help you with? Sentence7: There are two options. Prezzo is moderately-priced and La Margherita is cheap. Would you like me to book a table for you at one of those? Sentence8: Saturday at 15:15. Sentence9: No, that's it. Sentence10: Could you see if there's anything at 14:15? Sentence11: There are three trains, one arrives at 6:43, one at 8:43, and one at 10:43, which would you like to book? Sentence12: I was unable to book a reservation at La Margherita for Saturday at 15:15. Is there another day or time that you would like? Sentence13: Great! I've booked your trip on Saturday leaving Stevenage and arriving in Cambridge at 10:43. Your reference number is 5CWS7ER4 . Is there anything else I can help with? Sentence14: I want a train out of Stevenage on Saturday. Sentence15: I want to arrive by 11:30 at Cambridge. Sentence16: Alright, did you have a certain destination in mind? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User