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: I apologize. You're booked at the Hamilton Lodge and your Reference number is : UC7W5EFU . Can I assist you with anything else? Sentence2: I have 3 star guesthouses in the north. One has free wifi and parking while the other has neither. Which one would you prefer? Sentence3: I'm afraid 06:55 is the earliest I could find. Sentence4: What? 16:15 is later that 6:55. Are you saying you have nothing arriving in almost 10 hours after 6:55? Sentence5: No problem. I have the rooms booked for you. What else can I do? Sentence6: The one with wifi will work. I need to book it for Friday, 5 nights, 4 people. Sentence7: Okay thanks. Can you also help me find somewhere to stay? I'd like a guesthouse in the north preferably with a 3 star rating. Sentence8: Okay, your booking was successful. The total fee due at the station is 70.4 GBP. The reference number is 8RU6MZ5J . Sentence9: Thank you for contacting us have a nice day. Sentence10: Yes I would like this train booked. I need ticket for 4 people. I also need the reference number please. Sentence11: Sorry, there was a miscommunication earlier. TR8314 is your best bet. It will arrive in Norwich at 15:55 on Friday. Sentence12: Reference number please, come on, this is taking too long. And I didn't even get the hotel name from you, is there a manager? Sentence13: Of course. There is a train leaving Friday at 5:36. Would you like me to book it for you? Sentence14: It arrives by 06:55 would that be okay to book for you? Sentence15: I'm looking to book a train that will depart out of Cambridge. Can you give me information about trains that leave Cambridge and arrive in Norwich? Sentence16: What time does it arrive? Sentence17: No I need one that arrives at 16:15. Sentence18: That was all I needed. Sentence19: TR2534 arrives at what time? Sentence20: TR2534 arrives that time. can i book for you? Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User