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: Anything else I can do for you? Sentence2: There are 8 4-star guesthouses in north. Do you have a price preference? Sentence3: Wonderful. That's all I needed. Thank you! Sentence4: We have 18 available guesthouses. Which area would you prefer? Sentence5: TR5266 arrives by 15:51 if you'd like that one Sentence6: The price is 23.60 pounds per ticket. Sentence7: It is 37.80 pounds. Sentence8: I don't need to book that today. Thanks for your help. Sentence9: Great! You're booked at Worth House with reference number 3HCUPL7S . Would you like more information? Sentence10: I'd like some place on the north end, please. Sentence11: Thank you very much. Sentence12: I actually need to arrive in leicester on Monday by 17:45 out of Cambridge. Sorry for the confusion. Sentence13: Not today. Thanks. Bye. Sentence14: Sure, would you like me to book that for you? Sentence15: Thank you! Can you also help me with a train please? I need a train departing cambridge on thursday. Sentence16: I'm looking for a place to stay when I visit Cambridge. I want to stay at a 4 star guesthouse. Sentence17: I need to arrive 17:45. Sentence18: I have train TR4564 departing Cambridge at 15:21 and arriving in Leicester at 17:06. Would that be a good option for you, or would you prefer something earlier? Sentence19: Yes, could you please tell me the price for this train? Sentence20: What would be the price on that one? Sentence21: There are 5 trains going to London Kings Cross on Thursday. What time do you need to arrive by? Sentence22: I do not. I would like to book the cheapest one for 2 people staying 4 nights starting on Thursday. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User