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: Could you please make a reservation on Sunday for 7 people at 21:00? I would like a reference number. Sentence2: Your booking is complete. Your table is reserved for 15 minutes and your reference number is NCQJQGNE . Is there anything else I can help with? Sentence3: Unfortunately, the restaurant is already booked at that time. Is there another day or time you would like to go? Sentence4: There is a train at 15:39 and several others every two hours after that. Can I book a seat for you? Sentence5: I'm leaving from London Liverpool Street after 14:45. Sentence6: Booking was successful, the total fee is 13.28 GBP payable at the station . Your Reference number is 33Z0FMIQ . Sentence7: I think that is it. Thanks so much for your help Sentence8: Great. Can you also help me find out about a restaurant called charlie chan? Sentence9: I have 202 trains traveling to cambridge on Sunday. Where will you be departing from, and what time would you like to arrive? Sentence10: No, just one ticket please. Sentence11: Okay thank you for calling. Sentence12: Hi, I need a train to Cambridge on Sunday. Sentence13: please book me on the 15:39 train. Sentence14: How about 20:00? Sentence15: Will you needing more than one ticket? The cost per seat is 13.28 pounds. Sentence16: Charlie Chan's address is Regent Street City Centre and the number is 01223361763. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System