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: Yes, I can help you with that! What type of food would you like to eat and what is your price range? Sentence2: Thank you. I also need a train the same day. Sentence3: Booking was successful, the total fee is 79.19 GBP payable at the station .Reference number is : 8M72FMPK . Sentence4: Well, I am coming to Cambridge and was hoping to try some local restaurants. Can you help me with my choices? Sentence5: I want ot get in by 8:00, I need to get in in plenty of time for my Sunday booking. Sentence6: I'll give that a try. Book a table for 6 people for Sunday at 12:30 please. Sentence7: I need something expensive please preferably in the North. Sentence8: Did you have an arrival or departure time in mind? Sentence9: Thanks for contacting us, have a pleasant stay! Sentence10: The TR7721 would work for you, do you need a booking? Sentence11: Ok, let's narrow this down a bit. Where would you like to depart from and where are you going? Sentence12: Thanks you, that is everything, you helped me a lot. Thanks a bunch!! Sentence13: If you like European food, I'd recommend City Stop Restaurant. Sentence14: I am departing from Peterborough and going to Cambridge. Sentence15: Thank you. I have booked you a table for six on Sunday at 12:30 at City Stop Restaurant, and your reference number is CAWRD4D1 . Sentence16: Yes, I need 6 tickets and the reference number of the booking. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User