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: Booking was successful, the total fee is 50.5 GBP payable at the station . Reference number is : GAF920N6 . Is there anything else I can help you with? Sentence2: No there is nothing else today. thanks, bye Sentence3: Yes. Please reserve it for 5 people on Friday at 13:45. Sentence4: Hi, I'm looking for a European restaurant. Sentence5: Unfortunately, I am unable to book it right now. Sentence6: Yes, can you book it for 5 people and get me the reference number? Sentence7: May I get some more information from you to ensure we get you on the best train possible for you, the last bit of information I need is where you would like to arrive via train. Sentence8: Booking was successful. The table will be reserved for 15 minutes. Reference number is : DJ7MZL41 . Is there anything else I can help you with today? Sentence9: Of course, my destination will be stansted airport. Sentence10: Is this actually located in the centre area? I just want to make sure. Sentence11: Great. I'll also need to find a train out of cambridge. I need to leave sometime after 13:45. Sentence12: You're welcome and enjoy your stay. Sentence13: Oh. Could you please try again? Sentence14: The Eraina is an expensive European restaurant located at Free School Lane City Centre. Sentence15: I have train TR1316, It arrives at 15:08. Would you like me to book it for you? Sentence16: Yes it is located in the centre area, shall I reserve a table for you? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User