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, you're all set. Is there anything else I can do for you? Sentence2: No thanks. That would be all. I appreciate your help. Take care. Bye. Sentence3: I would like to arrive to Cambridge from Broxbourne and would like to leave after 15:45. Sentence4: Yes. I actually need 3 seats Sentence5: Do you mind if it's a guest house? The Alexander Bed and Breakfast is an inexpensive 4 star guesthouse offering both free wifi and free parking. Sentence6: No thanks. I forgot I should wait to book until I am sure how many people we will have. Thanks though. Good night! Sentence7: No thank you I will call back Sentence8: I need to get out of Cambridge quick! Can you find me a train for tomorrow, Tuesday? Sentence9: Can you find me a place to stay in the centre. I don't need internet. Sentence10: All of the 4 star hotels in the area are expensive. Would you like me to drop the star rating for you, or are you okay with it being expensive? Sentence11: If there are no hotels with free parking in the centre, how about one with free wifi? Sentence12: I guess that will work book for 2 please Sentence13: I'm sorry, I'm not finding any matches, would you like to try something else? Sentence14: A train is leaving Broxbourne at 16:32, arriving Cambridge at 17:32. Shall I book a seat for you? Sentence15: Well, I do need a place to stay. How about one with free wifi in the centre of town? Sentence16: Did you need a reference number or anything like that? Sentence17: I can help you. What is your destination? Sentence18: Okay, have a great day! Sentence19: No, I really would like a hotel in the centre with free parking and it can have wifi. Sentence20: OK. What day will you want to check in, and for how many nights? Sentence21: I would like to check in on Tuesday please. And I want to stay for one night. Sentence22: The booking was successful. Your reference number is Y25Y52KM . Sentence23: Ok. Is there anything else you need? Information about attractions or a restaurant reservation perhaps? Sentence24: The university arms hotel sounds perfect: hotel in the centre of town, expensive, 4 stars, with internet and parking. Can I book a reservation for you? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System