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've booked you at fitzbillies restaurant. Your reference number is X5JH9O7F . What else can I help you with today? Sentence2: I'd like something expensive please. Sentence3: Yes, there are a number of options. Did you have a price range in mind? Sentence4: Yes, whatever you recommend will be fine. I need a reservation for monday at 10:15. 2 people please. Sentence5: I'm going to Bishops Stortford. Sentence6: We have three options that meet your criteria. Would you like a recommendation? Sentence7: You're welcome, let me know if I can assist with anything else. Sentence8: yes please and I need the price and arrival time Sentence9: Oh, that's too bad. I do need something in the center. Is there any British food? Sentence10: Just 1 ticket please. Sentence11: How many tickets do you need? Sentence12: I am looking for a train leaving cambridge after 15:00. Sentence13: what is your destination? Sentence14: Yes, I would like to find an expensive Austrian food. Sentence15: The TR2730 leaves at 15:29. Do you want to book it? Sentence16: Booking was successful, the total fee is 10.1 GBP payable at the station. Your reference number is : 12VHBCG9 . Can I help with anything else today? Sentence17: I'm sorry, but there are no Austrian restaurants anywhere in Cambridge. Would you like to try a different type of cuisine? Sentence18: Great! Thank you! That's all I need. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System