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'm sorry, I lied about having a wife. I just need to know if there are any trains to stevenage available on monday. Sentence2: Yes, could you book a table for 4 people at 14:45 on sunday? Sentence3: I need that information emailed or faxed to me, please. Sentence4: I think that is all the info I will need. Sentence5: What about your wife? Does she need a ticket? Sentence6: The train should arrive by 15:30 and should depart from cambridge. Sorry still no wife. Sentence7: Unfortunately, there are not any Tuscan restaurants in town at all. Is there another type of cuisine you would enjoy? Perhaps maybe Italian? Sentence8: I do not have a fax machine. Sentence9: Royal standard is available, would you like to try them? Sentence10: It's fine. I'm over needing a fax machine. I think I've got everything I need. Sentence11: Can you tell me about any expensive places to dine in the east side? Sentence12: Great! Let me ask my wife if there was anything else she was curious about. Sentence13: OK, I'll be here! Sentence14: Are there any expensive restaurants in the east that serve gastropub food? Sentence15: There are several. Is there a certain type of food you would like to have? Sentence16: Unfortunately, we do not have that capability. If we do a booking for you, we can provide you with a reference number though. Sentence17: I would like to go to a Tuscan restaurant, please. Sentence18: I was able to do that. Your reference number is 1CYX3L33 . Sentence19: The TR1898 meets your criteria. The departure time is 13:21. The duration of the trip is 49 minutes. Sentence20: No. I just need the train ID and departure time, please. Sentence21: Great. I hope you and your wife have a great trip. Sentence22: Where are you leaving from? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System