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 would like something in the moderate price range. Sentence2: How about Italian food, than? Sentence3: That sounds good. Can you book the table for 7 people on Tuesday at 16:15? I also need a train departing from Cambridge that leaves after 11:30. Sentence4: The first train to leave after 11:30 on Tuesday is the TR4344, which departs at 11:34 and arrives at 12:24. Would that one do? Sentence5: I have found several. Do you have any preference towards price? Sentence6: Prezzo in the west offers moderately priced Italian food. Would you like me to book it for you? Sentence7: I'll be going to peterborough on wednesday. Sentence8: Sounds perfect. I need seven tickets please. Sentence9: No, that will be all. Thank you. Sentence10: Let us know if we can help you further. Good day. Sentence11: Hello, are there any moderate catalan restaurants in town? Sentence12: I am sorry my database is showing none in the area Sentence13: Your reservation with Prezzo was successful and your reference number is ILWV6LDN . They'll hold your table for 15 minutes. What is your destination for the train? Sentence14: OK, I have your tickets booked, the total fee is 115.5 GBP payable at the station. Your reference number is: KYI5FPOG . Can I get you anything else? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System