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: What time did you want to leave london liverpool or arrive in cambridge? Sentence2: It has been a pleasure, have a great day. Goodbye Sentence3: Kymmoy looks like a good choice. Sentence4: Please reserve a restaurant for five people at 19:15 on Monday Sentence5: Booking was successful. The table will be reserved for 15 minutes. Reference number is : DWLEYVAV . is there anything else i could help you with? Sentence6: Not right now. However, I do need to find an expensive restaurant to dine at in the centre of town. Any suggestions? Sentence7: The arrival time is by 15:07 and it will take 88 minutes. Can I book that for you? Sentence8: Hi, I need a train out of london liverpool street on Monday Sentence9: TR6226 will leave at 13:39, would that work for you? Sentence10: Sure. Can I get the arrival time and how long it will take? Sentence11: That is all I need. Sentence12: i want to leave after 12:15 Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System