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: You're welcome, have a great day. Sentence2: I also need a train ticket. Sentence3: Booking was successful, the total fee is 115.5 GBP payable at the station . Reference number is : U0JGF786 . Sentence4: Yes, please book for 7 people, and give me the reference number. Sentence5: Hi, I'm looking for a theater. Sentence6: ADC Theatre in the centre is nice. Would you like the address? Sentence7: The train should arrive by 19:00 and should depart from cambridge. Sentence8: I'd be happy to help you find a train. Where would you be departing from and where would we be going to? Sentence9: Not especially, could you give me a recommendation? Sentence10: What time would you like to arrive or leave? Sentence11: I have a train leaving Cambridge at 5:06 and arriving to Peterborough at 5:56. The price is 16.50 pounds per ticket, would you like me to book it? Sentence12: Yes, please. Also, what is their phone number? Sentence13: Do you have a location preference? Sentence14: Awesome, thanks a lot. That's all I needed today. Sentence15: The phone number is 01223300085 and the address is on park street, postcode cb58as Sentence16: I will be going to Peterborough from Cambridge. Hoping to leave on Monday. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User