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: Okay. I have booked you for 2 at 12:00 at the Dojo noodle Bar on Sunday. Sentence2: 12:00 please, I will need a reference number. I also need a train that goes to stansted airport leaving after 10:30. Sentence3: Great thanks so much. Can you give me the reference number and also I need to get a train when your ready. Sentence4: Booking was successful for TR8207, the total fee is 20.2 GBP payable at the station. Your reference number is W7D3D21R . Is there any further assistance needed? Sentence5: Yes that is perfect, please also provide me with the reference number. Sentence6: I am looking for a cheaply priced restaurant in the centre of Cambridge. Sentence7: That should be all thank you Sentence8: No I'm not picky, anything is fine as long as it's in the centre of town. I need to make a reservation for 2 on Sunday. Sentence9: I need the train to leave Cambridge on Monday after 10:30 and go to Stansted Airport, and I need two tickets. I also need my reference number please. Sentence10: The reference number is RLOFK7YF . What do you need for your train? Sentence11: Have a great trip! Sentence12: What time would you like your reservation? Sentence13: There are a large number of options to choose from. Do you have a preference for the type of food you would like? Sentence14: There are 14 trains leaving Monday from cambridge to stansted airport after 10:30. The closest departure to that would be TR8207 leaving at 10:40. Shall I book this for 2? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User