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: Yes, I'd like to book for 3 nights starting the same day. There will be 5 people. Sentence2: I need one that includes free parking, but it does not need to have internet. Sentence3: The booking was successful. The reference number is FWFEVQI8 . Sentence4: Alright, I have 5 tickets booked. your reference number is UDGBVRLM . Sentence5: What day would you be traveling? Sentence6: Thank you - that's all I need today. Have a great day! Sentence7: The earliest train leaves at 11:16 and every hour thereafter. A ticket costs 14.08 pounds. Can I help you book? Sentence8: Both the Gonville and the Lensfield have free parking and internet. The Gonville is central, whereas the Lensfield is in the south. Sentence9: My pleasure. Have a great day! Sentence10: Okay, I will book for you then. How many days and people, and would you like it to start the same day? Sentence11: I also need to book accommodations. Something in the expensive range with a 3-star rating will do nicely. Sentence12: Yes, let's try 2 nights and see if that works. Sentence13: I will be traveling on Saturday from Norwich. Sentence14: Please book the 11:16 train for 5 people and can I please have the reference number? Sentence15: There are two hotels that meet your criteria; the Gonville Hotel and The Lensfield Hotel. Would you like to book a room with one of these? Sentence16: I need a train that leaves after 11:00 and goes to Cambridge Sentence17: I think I would like the Gonville in the central area. Sentence18: I am afraid they have no bookings available. Would you like a shorter stay or different day. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System