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: There will be 6 of us. 16:15, if possible. Sentence2: No I do not can you recommend one please? Sentence3: OK, your table is booked, ref#1GRC21JW . Is there anything else I can help you with today? Sentence4: yes! from where will you be departing? Sentence5: i will need to arrive by 19:00 on monday. Sentence6: There are 33 places in Centre that meet that criteria, do you have a specific cuisine in mind? Sentence7: How about the Bedouin? They serve African cuisine. Sentence8: That would be perfect if it is in expensive range. I need to book it for sunday. Sentence9: I will go from Cambridge to Stansted Airport. Sentence10: great, how many people will be in your party? Sentence11: What time do you need to leave or arrive by? Sentence12: Yes, please give me the price. Sentence13: it will cost 10.10 pounds Sentence14: Thank you that is all I need. Sentence15: Are there any high end restaurants within the centre of town? Sentence16: Thanks for letting us assist you today! Enjoy your trip! Goodbye. Sentence17: The TR3571 can get you there by 18:08, is that ok? Sentence18: Yes, can you help me find a train to get me to the Stansted Airport on Monday? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System