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: Might I ask if you had a destination and arrival time in mind? Sentence2: Could I please get a table booked for 1 person on Sunday at 20:00? Sentence3: Booking was successful. The table will be reserved for 15 minutes.Your reference number is : PQ0VC3CL . Is there anything else I can help you with today? Sentence4: Can you please tell me how to get to the Curry King restaurant please? Sentence5: I want to arrive at birmingham new street by 11:30. Sentence6: I'll take the third train. For one person, and I need the reference number. Sentence7: Thank you for using our system! Sentence8: Fantastic, there are five options available to you, all priced at 75.10 pounds. They leave a minute after the hour every hour, starting at 5 am. Which would you prefer? Sentence9: Thank you, yes, I also need to find a train. I'd like to leave on Monday, departing from Cambridge. Sentence10: Thank you very much. Have a nice day! Sentence11: Curry King restaurant is located in the centre of town, address 5 Jordans Yard Bridge Street City Centre, postcode cb21ug. Sentence12: Hello, the reference number for your booking is B6OKTGHX . Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User