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: Great. Have a nice day! Sentence2: The trainID is TR6270 and the travel duration is 38 minutes. Sentence3: That is great. I think you have provided all the help I need today. Thank you. Sentence4: I am looking for a restaurant named Prezzo in Cambridge. Sentence5: Great I also need a train for the same day as the restaurant heading to cambridge. Sentence6: Sure, where are you departing from and what time would you like to leave? Sentence7: I have five trains that arrive then, shall I book the train for you and if so for how many tickets? Sentence8: The address to Prezzo is 21 - 24 Northampton Road and the phone number is 01799521260. Would you like me to make you a reservation? Sentence9: Sure. There is actually only one train available and it costs 10.10 pounds. Do you need a reservation? Sentence10: I am looking to depart bishops stortford and need to arrive by 08:00 Sentence11: Yes, could I please have the train ID and the estimated travel time? Sentence12: Ok can you book that for me, thanks! Sentence13: You are welcome. If you ever need any other assistance, please contact us. Sentence14: Yes, for one on Thursday, 16:15 Sentence15: Could you tell me the ticket prices for the train? Sentence16: Booking was successful, the total fee is 10.1 GBP and is payable at the station. The reference number is D3VKUHBI . Thank you. Sentence17: Great! I have you booked - reference number 0Z1CRCLO . Please note - table will be reserved for 15 minutes. Sentence18: I will definitely keep that in mind! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User