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: The restaurant is expensive. Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : BLM7RVCW . Sentence3: I have 21 restaurants in the moderate price range but none serve seafood, would you like to try another type of food? Sentence4: thank you that will be all Sentence5: I have one, Loch Fyne. Would you like to make a booking? Sentence6: I'd like them for Friday at 18:15, please. Table for 6. Sentence7: I'm looking for a restaurant in the centre that serves seafood. Can you help? Sentence8: I would like to book somewhere with moderate prices. What other options do I have? Sentence9: I have the riverside brasserie located at doubletree by Hilton Cambridge Granta Place Mill Lane. Would you like reservations? Sentence10: How about one that serves modern european. Sentence11: yeah, i need reservations for 6 Sentence12: Of course I'd like the reference number. Sentence13: Yes please, do you know how much it costs? Sentence14: Would you like a reference number? Sentence15: When would you like those reservations? Sentence16: Have a great day! Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System