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 would like it at 15:00 on the same day. Sentence2: I need to catch a train in London King's Cross to ride into Cambridge. Sentence3: Very well, I've booked you at Restaurant One Seven for 4 people at 15:00 on Monday. Would you like the booking reference number? Sentence4: Sorry about that, the reference number is 5F63AFCU Sentence5: Thank you for your time. Sentence6: I have booked your train. London King's Cross to Cambridge at 13:17 on Monday. Sentence7: I'm glad I could help you today. Have a great trip. Goodbye. Sentence8: Thank you! That sounds excellent! I am also craving British food. Are there any moderately priced British restaurants there? Sentence9: Not really, I'll just need to book it for the same day for 4 people. Sentence10: What time would you like the reservation? Sentence11: I want to leave on Monday after 12:45. Sentence12: I do apologize, train TR3194 would leave at 13:17, NOT 14:12. The travel time would be 51 minutes. Would you like me to book this train for you? Sentence13: I can help with that. What day and time were you looking to depart? Sentence14: There is a train available on 14:12. Sentence15: Yes can you please book it. Sentence16: Yes of course I want the reference number! Why wouldn't I! Sentence17: We have four in the centre area and one int he west, any preferences? Sentence18: That is fine. Can you provide the arrival time, train ID, and travel time. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System