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: That will be everything, thank you. Sentence2: Yes, please! And I'll need the reference number. Sentence3: I also need a train. Sentence4: Okay, I can help you with that! Where will you be departing from, and what is your destination? Sentence5: What about 3 nights? Sentence6: Could you be more specific, for example what is the price range you are looking for? Sentence7: I am sorry but Acorn Guest House is heavily booked. Do you want to book for another day or for a shorter stay? Sentence8: Happy to help. Sentence9: I hope you enjoy your stay. Have a good day. Sentence10: Ca I help you with anything else? Sentence11: Booking was successful. Address is 154 chesterton road. Postcode cb41da. Reference number is: IOHUVGA1 . Anything else I can help you with? Sentence12: The first train departing Cambridge after 16:00 is the TR2776, leaving 16:01, arriving in Birmingham, New Street at 18:44. Would you like to book a seat on this one? Sentence13: Price doesn't really matter. I would like free parking though. Sentence14: The booking was successful. Your total is 60.08 GBP, payable at the station. Your reference number is VFIRSFKS Sentence15: Okay good bye. Sentence16: acorn guest house has 4-stars and has free parking. Would like to book it? Sentence17: Thank you very much for your help. Sentence18: Hi there. I could use some help finding a place to stay that is 4 star rated. Sentence19: I need to leave on Sunday after 16:00 please. Sentence20: There are a lot of trains that go that route what day and time do you want to leave or arrive by? Sentence21: Yes, for 1 person for 5 nights starting on thursday. Sentence22: I will be leaving cambridge headed to birmingham new street. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System