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: Yes please do that for me and give me the reference number. Sentence2: I want to depart from broxbourne after 16:00 Sentence3: There are several. Is there a price range you prefer or any amenities that you require? Sentence4: It will actually be for 7 people please. Sentence5: I am looking for a hotel on the east side. Sentence6: I can book that now. Sentence7: Okay, what kinda of information are you looking for? Sentence8: Ok. The booking was successful. Your reference number is OBFYQJZU . Sentence9: I really don't care if it has free parking. Sentence10: It will be for five people please. Sentence11: I will also need a train. I'm traveling on Thursday to Cambridge. Can you help please? Sentence12: Yes it would. I'd like to book this Thursday for 2 nights, for 7 people. Sentence13: express by holiday inn cambridge is a 2 star expensive hotel in the east side. Would that one work? Sentence14: The TR0579 departs at 16:32. Would you like me to book that for you? Sentence15: I am looking for information in Cambridge Sentence16: Thank you that is all the information I need today. Sentence17: Booking was successful, the total fee is 125.29 GBP payable at the station . Reference number is : UN5K7FML . Sentence18: Yes, please and I need a confirmation number. Sentence19: and for how many people ? Sentence20: Certainly. And where will you be departing from? Sentence21: I'd be happy to help with your request, first I'll need to know how many tickets you'd like to reserve? Sentence22: You're welcome. Have a nice day. Bye. Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User