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: Train TR0031 departs Stansted Airport for Cambridge at 09:24 and arrives at 09:52. Would this be ok? Sentence2: Sounds great! Can I get tickets for 3 people? Sentence3: There are 5 colleges there. Churchill college, Clare College, Clare Hall, Magdalene College and Queens' College Sentence4: I've booked you 3 tickets. Your total is 30.29 pounds and the reference number is 51M2VN7D . Sentence5: Stansted airport. Also, if I could arrive by 11:00 that would be great. Sentence6: I am planning to visit cambridge and would like a train leaving on thursday. Sentence7: Great. I am also looking for colleges to visit in the west. Sentence8: No, that is all that I needed. Thank you so much for your help! Goodbye. Sentence9: You're so welcome! Have a great day! Sentence10: No problem. Which station will you be departing from? Sentence11: Churchill College is on Storey's Way, their postcode is cb30ds and phone number is 01223336233. It's free to get in. Is there anything else you'd like to know? Sentence12: Can I get more information on the first one? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System