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: I need you to check again. Train from Ely to Cambridge. Sentence2: I'd like to leave Cambridge on Wednesday, please. Sentence3: Sounds great, what is the price and arrival time? Sentence4: Thank you for contacting us and have a nice day. Sentence5: What day would you like to travel? Sentence6: Yes, there will be 4 of us on Wednesday at 11:00. Please book. Sentence7: I recommend cotto. It has British cuisine. Would you like reservations? Sentence8: OK, the earliest train after 08:15 is the 09:50 to Cambridge. It's a quick, 17-minute trip. Would you like to book seats? Sentence9: Awesome, thanks for all your help! Good day Sentence10: I have made those reservations and your reference number is KOSM5AJ9 . Sentence11: Type of food doesn't matter, what would you prefer? Sentence12: There are no trains on Wednesday. Sentence13: Thanks! I'm also looking for someplace to eat in the center of town. Something in the moderate price range. Sentence14: I need a train to Ely after 08:15, please. Sentence15: What type of food would you like to eat? Sentence16: It will cost you 4.40 pounds and it arrives by 10:07. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User