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: Good morning! I'm trying to buy a train ticket that goes from Peterborough to Cambridge. Can you help me do this? Sentence2: Yes please. I need 5 seats. Sentence3: The train should leave on Sunday and should arrive by 16:45 Sentence4: No, I'm sorry, that's much too early. Could you find one closer to 16:00 or 16:20? Sentence5: The latest train departs at 15:48. Does that work for you? Sentence6: I have a train arriving at 08:09 that leaves at 07:19? Sentence7: There is the Man on the Moon in the Centre located at 2 Nofolk St. Their phone number is 01223474144 Sentence8: Booked! At the station you will pay 66 pounds. Reference number: JQ91RH6X . Sentence9: Sure, how about one that is in the type of entertainment? Sentence10: Okay, have a good day as well. Sentence11: I don't see anything in that area. Can I search a different area or venue for you? Sentence12: Thank you for all your help today. Have a great day. Sentence13: Can you give me the postcode and entrance fee? Thanks. Sentence14: I don't have the entrance fee, but the postcode is cb12lf. Sentence15: 16:38, fifty minute travel time. Shall I book it? Sentence16: Great I also need to find a concerthall to visit in the south. Sentence17: I can absolutely help! Do you have a specific day and arrival/departure time? Sentence18: For the one that departs at 15:48, what time would I arrive? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User