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: Thank you! That is all the information I need. Sentence2: TR9775 arrives by 12:52, would you like more info or tickets? Sentence3: I am looking for information in Cambridge looking for a restaurant in the north Sentence4: How about an expensive venetian place? Sentence5: I would like to take a train from stansted airport to cambridge, on Thursday, with arrival by 13:30. Sentence6: Yes, your reference number is 80SX075C . Is there anything else I can help you with today? Sentence7: I do have one expensive asian oriental restaurant in the north. It is called Saigon City. Can I make you a reservation? Sentence8: We have a range of options in the north. Do you have preferred cuisine or price range? Sentence9: How about something that serves Asian Oriental food? Sentence10: We booked you for Thursday at 16:30, is their anything else I can assist you with? Sentence11: That sounds great. I will need a table for 5. Sentence12: Can you provide me with a reference number, please? Sentence13: What day and time would you like this reservation for? Sentence14: excellent, have a great day! Sentence15: Please give me the departure and travel time. Sentence16: It departs at 12:24 and the duration of the trip is 28 minutes. Sentence17: I'm sorry, I'm not finding any results. Is there another location or price range you'd like to try? Sentence18: 16:30 on Thursday, please. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System