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: Sure thing! What kind of food are you looking for? What is the price you'd like to pay - Cheap, Moderate, or Expensive? Sentence2: There are 2 trains making that trip. One leaves at 21:50, the next at 23:50. Would you like to book one of those trains? Sentence3: yes Booking was successful, the total fee is 4.4 GBP payable at the station . Reference number is : T5GD6FIT Sentence4: Yes, I'd like to book the train that leaves at 21:50. Sentence5: I need a train to Ely on Monday. Sentence6: Did the booking go through? Sentence7: I need to depart from cambridge after 21:45. Sentence8: Great! Can you also help me find a place to dine in the centre area? Sentence9: I can help you with that. Can you please tell me what station you would like to depart from? Sentence10: I would like to book the train leaving at 21:50. Sentence11: Thank you, that was quick expedient service. I am all set, hope you have a great day. Sentence12: How about darrys cookhouse and wine shop? Their address is 40270 King Street City Centre. Postcode is cb11ln and phone number is 01223505015. Sentence13: You're so welcome, enjoy your visit! Sentence14: I'm looking for European food in the city's centre and in the expensive range. I need the address, postcode and the phone number. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User