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: Are there any cheap restaurants in the centre that I can try? Sentence2: No thank you. I need to find a train leaving Cambridge after 16:30. Sentence3: I have 5 different trains leaving Cambridge on Friday evening, which destination do you prefer: kings cross or liverpool street? Sentence4: Sure! The Golden House is a Chinese restaurant that's located at 12 Lensfield Road, City Centre. Would you like a table reserved? Sentence5: You're very welcome. Good-bye. Sentence6: Booking was successful, the total fee is 12.8 GBP payable at the station. Reference number is : L9DAX54Q . Can I help you with anything else today? Sentence7: 17:21 sounds fine. Please make a booking for 1 person and let me know the reference number. Sentence8: I actually need to go to stevenage. Sentence9: There are trains leaving Cambridge every two hours starting at 17:21 and arriving in Stevanage one hour later. Which time do you prefer? Sentence10: I would like to leave on Tuesday, please. Sentence11: Thank you goodbye Sentence12: can you suggest one, I am not picky, just need the type and address Sentence13: What day do you need to leave? Sentence14: Yes, there are many. What type of cuisine are you interested in? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System