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: The postcode is cb23qf. Is there anything else I can help you with today? Sentence2: Stansted Airport. I'll need a train that leaves after 10:45. Sentence3: That's a great spot for nightlife! It's located in the city centre and they only charge 4 pounds for their entrance fee. Sentence4: Booking was successful, the total fee is 50.5 GBP payable at the station. Reference number is 7TR7SDNQ . Sentence5: Yes that will work. Can we book for 5 people? Sentence6: Thank you and have a good trip. Sentence7: Yes, I'm looking for a train to Cambridge on Monday. Sentence8: I am looking for the soul tree nightclub. Sentence9: Thanks! That's all I need for today. Goodbye. Sentence10: What area is it located in and what is the postcode? Sentence11: I can certainly help you with that. Where will you be departing from? Sentence12: I have train TR5754 that will be departing at 11:24 and will arrive by 11:52. Do you think that would work for you? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User