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: I need a moderate priced room in the South. Hotel, or guesthouse. Sentence2: Yes, train TR2941, departing Cambridge at 9:01 will cost 14.32 pounds per ticket. Sentence3: i am looking for a train. The train should go to broxbourne and should leave on sunday Sentence4: good bye and have a great day Sentence5: There are no results matching your request. Would another location be okay, or perhaps a different price range? Sentence6: Yes there are several trains available. What is your departure site and arrival and departure times. Sentence7: There are several in Cambridge. What part of town would you like to stay in? Sentence8: Please book me a room, I would like the reference number. Sentence9: Your reference number is T921UTQK . What else can I do for you today? Sentence10: Could I get the price, departure time and train ID? Sentence11: I think I'd prefer a hotel. I need it for 3 people, 2 nights starting Friday. I need a reference number please. Sentence12: I would like something in the moderate price range. Sentence13: There are no moderate 3 star hotels in the whole of London? Sentence14: Nothing else. I think that's all I needed. Have a good day. Bye. Sentence15: Great. I also need a moderate hotel in the south. Sentence16: I'd like to leave from Cambridge to arrive at Broxbourne by 10:45. Sentence17: There is the lensfield hotel but it is in the expensive price range, would you like me to try another area? Sentence18: I am sorry but there are no moderately priced 3 star hotels. Could we try another search? Sentence19: Would a guesthouse be ok? I have a 3 star, moderately priced guesthouse in the south with wifi. Sentence20: Can you suggest something with free wifi and a 3 star rating? I'm open to less expensive price ranges. Sentence21: TR2941 arrives at 10:01. Sentence22: bridge guest house is popular this time of year and would suit those needs. Can I book you a room? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User