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 do not have that information, but they can be reached at 01223866800. Sentence2: Thank you, that's all I need today. Sentence3: Yes please, could you advise on the price per night for the room? Sentence4: Can you please book a room there for 2 people starting on Wednesday for 4 nights? Sentence5: OK I have booked you a room for 4 days beginning Wednesday. Your reference number is YKUIEGTJ . Is there anything else I may assist you with? Sentence6: The Express by Holiday Inn Cambridge is an expensive 2-star hotel on the east side of Cambridge. It offers free wifi and free parking. Would you like more information? Sentence7: I would like information about the Express by Holiday Inn in Cambridge, please. Sentence8: I have three trains that match your criteria, how many tickets do you need? Sentence9: I just need one.I also would like to know the cost, arrival time and ID of the train. Sentence10: My pleasure. Enjoy your trip! Sentence11: Yes I need a train on Sunday after 19:00 from Cambridge to London Liverpool Street. Sentence12: A ticket on TR9732 costs 13.28 pounds and will arrive at 21:27. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System