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: Ok, could I get the reference number for that reservation please? Sentence2: That works. Then I'd to book for seven people at 11:00 on friday Sentence3: Could you try the same requirement for Wednesday? Sentence4: Sounds Great! I will contact them about booking a reservation for seven people at 11:00 on Friday Sentence5: I'm very sorry there seems to be an error in our system. There are no results for a seafood restaurant. Is there another type of cuisine you'd like? Sentence6: I need a place to eat that serves sea food. Sentence7: I have only one option that is in the expensive price range and in the center of town. It is called Loch Fyne. Would that interest you? Sentence8: I was able to book you for a table for 7 on Wednesday at 11:00. The reference number is XBG9YHTB . Is there anything else that I can help you with? Sentence9: The TR8272 to London Kings Cross on Thursday leaves at 05:00 and arrives and 05:51. The price is 23.60 pounds. Is that a good train for you? Sentence10: I have you booked for 7 on TR8272. Your total fee is 165.2, payable at the station and your reference number is TMUT96XE . Can I further assist you? Sentence11: no that's all thanks! Sentence12: As long as it is departing from Cambridge and arriving before 14:00, I am good with that train. I am needing to book for 7 people please. Sentence13: I also need a train to London Kings Cross, on Thursday. Sentence14: You're very welcome! Have a great day! Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System