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 have two trains on a Sunday matching those demands. One leaves at 21:07 and one leaves at 24:07. Any preference? Sentence2: Yes, are there any museum that I should check out in the Centre area? Sentence3: Have a great visit! Sentence4: OK, you have 2 tickets booked for a total of 16.16GBP. Your reference number is ASHITD7U . Can I help you with anything else today? Sentence5: 01223333516. Do you need anything else? Sentence6: I can help with that. Where would you like to go? Sentence7: yeah, what's their phone number? Sentence8: the 21:07 train please. Sentence9: How about the museum of archaelogy and anthropology located at university of cambridge, downing street. Entrance fee is free. Anything else I can help with? Sentence10: No that will be it, thanks! Sentence11: cool i need to tickets Sentence12: Train TR7879 will leave bishops stortford at 21:29 and arrive at cambridge by 22:07. Sentence13: I need help finding a train. Sentence14: bishops stortford and should leave after 19:15 on sunday and go to cambridge Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System