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: Ashley hotel is available, would that work for you? Sentence2: Thank you and enjoy your visit to cambridge! Sentence3: Yes, I'd like to book for three people please. Sentence4: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence5: I've booked you 3 seats on the TR3720 with a total fee of 30.29 GBP which is payable at the station. The reference number is Y3ATC2SJ . Sentence6: I have train TR3634 leaving cambridge and arriving london kings cross at 13:51. Will that work for you? Sentence7: Sorry about all that confusion. I think I've found you a train. TR3720 is the closest in time, leaving the airport 13:24, arriving Cambridge 13:52. Would you like a seat reserved? Sentence8: Thank you. Im also looking for a hotel in the north in the moderate price range. Sentence9: I need the train to go to cambridge and leave from stansted airport. Sentence10: I reserved a seat for you on the 05:24 train. Your reference number is9BQT5T9M . Your ticket of 10.1 GBP is payable when you get to the station. Sentence11: Booking was successful, you reference number is DEMBOPOR, can I assist with anything else? Sentence12: No that is everything I need today. Thank you. Sentence13: I need a train from Stansted Airport to Cambridge, arriving by 14:45 on Wednesday, please... Sentence14: Great, that's all I needed. Thank you! Sentence15: Yes, I need a train for wednesday arriving at 14:45. Sentence16: Sure, can you book it for 2 nights and 3 people? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User