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: It's a hotel. There are 5 guesthouses in the area. Do you prefer cheap or moderate for the price range? Sentence2: I want to go from cambridge to ely, no preference for time but I need to book for 8 people. Sentence3: Great. Can you help me with a train as well? I'm looking to come in from Ely. Sentence4: What is your destination? And do you have any preference for day, departure or arrival time? Sentence5: There are 5 guesthouses that have free parking. Should I book one of them for you? Sentence6: There are trains that run every two hours every day starting at 5:50. Do you know what day you'd like to travel? Sentence7: Okay, none of them DON'T offer free wifi? If not, I'll need the address for one that does have wifi, please. Tell me about your favorite. Sentence8: no, but it should have free parking, please. Sentence9: Thank you and enjoy your visit. Have a great day. Sentence10: The price doesn't really matter. I just need free parking. It doesn't really need to have internet though. Sentence11: The allenbell is a guesthouse on the east. The addres sis 517a coldham lane post code cb13js. Sentence12: There are no hotels that do not have internet, but 7 which do have it. Do you have a specific price range you'd prefer? Sentence13: Is that a guesthouse or a hotel? I'd really prefer a guesthouse. Sentence14: Hi. I'm looking for a hotel in the east. The internet is not needed. Sentence15: The Express by Holiday Inn Cambridge is in the area and has free parking, would you like more information? Sentence16: No, I don't need anything else right now. Thank you for your assistance. Good Bye. Sentence17: I'm looking for Wednesday , arrive by 11:30 for 8 people Please. Sentence18: Booking was successful, the total fee is 35.2 GBP payable at the station. You reference number is 7ZCVR4Q3 . Can I help you with anything else? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System