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: Perfect, thank you. Sentence2: It appears that time is unavailable at this restaurant. Would you like to book the restaurant at a different time, or possibly book at a different location? Sentence3: Not just yet, could you provide me with the travel time for TR8824? Sentence4: TR8824 is to arrive by 19:27, making the duration of the travel time total to 88 minutes. Sentence5: Can you please book that for Friday at 13:15 for 3 people and give me the reference number? Sentence6: Yes I do! It is located in the north and is at a moderate price range level. It serves chinese food. Sentence7: Is there anything else I can help you with? Sentence8: Thank you for using Cambridge TownInfo centre, have a great day! Sentence9: Do you have any information on a restaurant called the Golden Wok? Sentence10: What day and time would you like to leave for London Liverpool Street? Sentence11: No, that's all for today. Thank you again! Sentence12: Thanks. Can you help me find a train to london liverpool street now? Sentence13: I would like to leave after 17:15 on saturday. Sentence14: How about 12:15 on Friday? Sentence15: The first train after 17:15 is TR8824 which leaves at 17:59. There are two later trains that day. Would you like to book one now? Sentence16: Booking was successful! Your table will be reserved for 15 minutes. Your reference number is EL18B6UX . Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User