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 was able to book you, your reference number is CEP20AFO ., total cost 57.28 payable at the station.. Any other questions? Sentence2: It is a college in the centre of town located at saint andrew's street, poscode cb23ap and their phone number is 01223334200. Sentence3: That's perfect. Please book it for 4 tickets. Sentence4: Good night, enjoy the rest of your evening. Sentence5: I need it to depart from Broxbourne and arrive in Cambridge. Sentence6: Train TR0279 arrives at 14:32 which is the closest one. Sentence7: Yes please. I've heard that Emmanuel College is an interesting place. What can you tell me about it? Sentence8: Where would you like to depart from and where do you want to arrive at? Sentence9: The TR7846 leaves at 09:32 and arrives at 10:32. Would that work? Sentence10: Great! I appreciate all the info. Goodbye! Sentence11: I'm looking for a train that arrives by 15:15 on saturday. Sentence12: Can I get one closer to my arrival time? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User