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: Ok. The booking was successful and your reference number is PFMOZLXC . Sentence2: I have booked 2 seats on TR4558. The cost is 13.20 pounds. Train leaves cambridge sunday at 16:06. Is there anything else I can help with? Sentence3: Is there a specific area you'd like me to search? Sentence4: Okay, please book that for 2 people and 5 nights starting tuesday. I'll need a reference number. Sentence5: Thank you, I also need to find a room. Sentence6: Thanks, that takes care of all my needs for today. Bye! Sentence7: Ok, I have 38 trains heading to Peterborough on Sunday. What time would you like to leave? Sentence8: There are 3 matches for your preferences. I recommend Ashley Hotel. Sentence9: No, that doesn't matter, as long as it has free wifi. I would like it to be a 2 star hotel. Sentence10: Hello, can you please help me find a train that leaves on sunday. I would also like the train to go to peterborough. Sentence11: Sure, there are plenty of trains that you could take. The first is at 15:34, then 16:06, and there are many more. Is there a time that's best? Sentence12: I would like to leave after 15:00. Sentence13: The 15:34 sounds perfect. Could you book me tickets for 2? Sentence14: Great, it was a pleasure assisting you! Goodbye! Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User