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: Yes there are many types of food and price ranges in Cambridge. Do you have a preference for either? Sentence2: TR5343 leaves Cambridge at 15:21 and gets to Stevenage at 16:10. That's the last train of the day. Would you like to book a reservation? Sentence3: Going to the sweet land of Stevenage, on tuesday. I need to get there by 17:00 Sentence4: Yes...for 3 people on Tuesday at 11:15. Sentence5: No can I just get the price please? Sentence6: Okay, what day and time would you like to travel and where is the destination? Sentence7: I have made the reservation and your reference number is 7PD27O8B . Sentence8: Hello, I am planning a trip to Cambridge. Can you help me with a restaurant? Sentence9: They serve french food and are in the north and quite expensive. Would you like to book a table? Sentence10: Thank you for contacting us. Have a nice day. Sentence11: I am also in need of a train leaving Cambridge. Sentence12: Sure. The price for that train would be 12.80 pounds. What else can I help you with today? Sentence13: That will be all for toady. Thanks ! Sentence14: No, just looking for a restaurant called Restaurant two two Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System