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 am also looking for a place to dine in the north area that has a cheap price range. Sentence2: I was able to successfully reserve your table for 18:30. Your reference number is A2FWMXJN . Is there anything else I can help you with? Sentence3: Can I get a time you would like to arrive by? Sentence4: I am not particular about what time we arrive provided we leave after 09:30. Choose one for me and give me the arrival time, travel time, and train ID. Sentence5: You're welcome please let me know if there is anything else I can help you with. Sentence6: I have two choices that match, Royal Spice that serves Indian food, and Da Vinci Pizzeria that servers Italian food. Do either of those work? Sentence7: How about at 18:30? Sentence8: Yes I would like Royal Spice, book a table for 8 people at 19:30 on the same day Sentence9: That will be all, thank you for your help. Sentence10: I'm sorry, there aren't any tables available at that time. Would you like to try another timeslot? Sentence11: I would be happy to help you with your request, could you be more specific on where you are departing/arriving? Sentence12: I will be leaving from Broxbourne on my way to Cambridge. Sentence13: Hello, I'm trying to find a train leaving on Friday after 09:30. Sentence14: I have train TR5678 leaving Broxbourne at 09:32 and arriving in Cambridge at 10:32. The travel time is 60 minutes. Anything else I can help with? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System