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: You're welcome, let me know if I can assist with anything else. Sentence2: I would like to know if you can book me a room for 5 nights starting Friday. I also need the reservation # Sentence3: sorry i am not able to find it Sentence4: Thank you. That is all that I need. Sentence5: I switched the booking to 3 people, and the new reference number is FW6X5F78 . Sentence6: How about one that serves Indian food instead? Sentence7: There are 5 that match you criteria. Tandoori palace is a great place, shall I book a table for you? Sentence8: Are there any expensive international food places in the west area? Sentence9: Tandoori Palace, 68 Histon Road, Chesterton. Post code cb43le. Is there anything else? Sentence10: Hi. I'm looking for a relatively expensive international restaurant to dine at this evening. Is there one that you would recommend? Sentence11: I need the Bridge Guest House for 3 people. I forgot to include that. Sentence12: what do you mean? you're the one who recommended it. Sentence13: I could not find any expensive international places to eat. Do you have any other preference? Sentence14: Well. I also need the hotel called Bridge Guest House. Sentence15: sure, i have their info. what would you like to know? Sentence16: Could I get address and postcode Sentence17: Nothing in the west,another area? Sentence18: I have booked a room for you for five nights at the Bridge Guest House, beginning on Friday. Your reference number is R175R6S0 . May I assist you with anything else? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User