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: Your table has been booked. Your reference number is LPQVDDE9 . Sentence2: Yes, please. I need to book 3 nights starting on Friday for 5 people. Sentence3: I am glad I could help you with lodging and dining from the Cambridge TownInfo centre. Good bye. Sentence4: Yes, please. I need reservations for 12:30 on Friday. There are 5 in my group. Sentence5: surprise me what is the best choice ? Sentence6: Saigon city is Asian oriental and is in the north as the hotel is. It is expensive. Shall I book it for you? Sentence7: I don't care about the price. Sentence8: Hi, I am looking for a nice hotel to stay in. I would like it to include free parking. Internet access is not necessary. Sentence9: acorn guest house is a 4 star hotel located north of cambridge would you like to reserve? Sentence10: i have many. will you please state the price? Sentence11: Yes, please give me reference number. Sentence12: That is all. Thank you. Sentence13: Will you be needing a reference number? Sentence14: Do they have internet? Sentence15: What food type are you interested in? Sentence16: Yes it does. Shall I book it? Sentence17: I'd also like a recommendation for a restaurant in the same area as the hotel. Sentence18: Booking was successful. Reference number is : 7OLQYP67 . What else can I assist you with today? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System