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: Great. Please book me 6 tickets. Sentence2: I recommend castle galleries located at unit su43, grande arcade, saint andrews street. Their phone number is 01223307402. Is there anything else I can help you with? Sentence3: Excellent, can you give me the postcode? Sentence4: Booking was successful, the total fee is 226.8 GBP payable at the station . Reference number is : TQQ2P14Y . Sentence5: Okay! When do you want to depart? Sentence6: Train ID TR5648 will be best for you. It will leave cambridge by 10:21 to arrive leicester by 12:06 and it will you cost 37:80 pounds. Sentence7: Please find me a train from Cambridge to Leicester Sentence8: You are welcome--have a great day! Sentence9: The postcode is cb23bj. Can I help you with anything else? Sentence10: nope that is it thanks for all of you help Sentence11: Woo that's steep but thank you. I also am interested in visiting the museum in the centre area of town, could you give me info on that? Sentence12: I'm leaving on Friday and I need to be in Leicester by 12:45. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User