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 to be in cambridge by 21:45. Could you find me close to that time? Sentence2: I'm looking for a place to stay in the north. Sentence3: Yes. I need a train from Ely to Cambridge. Sentence4: The trains departs from Ely every two hours at 5:52, 7:52 so on. What time do you plan to travel? Sentence5: I would like to leave on Tuesday please, can I have the price and depature times also? Sentence6: No, I am sorry another day perhaps or a shorter stay might be able to get that booked for you. Sentence7: Your best bet would be TR1537 which arrives in Cambridge at 19:52. The price is 4.40 pounds per ticket and the departure time is 19:35. Sentence8: Acorn guest house is in the north, would that work for you? Sentence9: Booking was successful. Your reference number is NTQSJSP0 . Do you need further assistance today? Sentence10: Yes if it has free parking, meals, pool and wifi. I want it to be in the expensive price range. Sentence11: Thank you! Please feel free to contact us if you change your mind or need further assistance! Have a great day! Sentence12: Can we try it for 1 night? Sentence13: And which day would you like to leave on? Sentence14: How about Ashley Hotel in the north part of town? It's on Chesterton Road. Sentence15: I am looking for a hotel in the north part of town with free parking, a 2 star rating, and in the moderate price range. Sentence16: Sounds good. Can you book it for four nights starting on Tuesday? Sentence17: That is all I need. Thank you. Sentence18: I'm sorry, there are no expensive hotels in the north area. Acorn Guest House is moderately priced, and does have free parking and wifi. Would you be interested? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System