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 19 trains to broxbourne on Monday leaving every hour starting at 05:01. Is there a specific time you'd like? Sentence2: All tickets from cambridge to broxbourne on that day cost 17.90 pounds each. Sentence3: No, thank you. That will be all for today. Thanks. Sentence4: I am also looking for a train that goes to broxbourne on monday. Sentence5: The one arriving closest to 13:00 is TR5971 leaving cambridge at 11:01 and arrives by 12:01 in broxbourne. Would you like to book a ticket? Sentence6: Just one, thank you! Please provide me with a reference number. Sentence7: Please book one. Sentence8: I would like to arrive in broxbourne by 13:00. Sentence9: Have a great day. Sentence10: I want a restaurant in the north of Cambridge that is within a moderate price range. Sentence11: There are two restaurants fitting your description, one is Chinese cuisine and one is Indian cuisine. Do you have a preference? Sentence12: Please book a table for 4 at the Chinese place at 12:30 on Sunday and give me the reference number. Sentence13: Okay you're all set for Sunday at 12:30. Your reference number is F5BTP63A . Can I help you find anything else? Sentence14: How many tickets do I need to reserve for your train? Sentence15: Can I just get the price on one of them? Sentence16: Booking was successful, the total fee is 17.89 GBP payable at the station. Reference number is : T1FGQFDJ . Can I help with anything else today? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System