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 would like to leave Friday and arrive by 17:45. Sentence2: Yes, that would work. Can you book me 4 tickets please? Sentence3: No. I think that's everything. Thank you for your help. Sentence4: No, that one won't work. I have to arrive by 17:45. Sentence5: Can I get the postcode and entrance fee for The Junction? Sentence6: Booking was successful, the total fee is 66.4 GBP payable at the station . Reference number is : X5EM7DTZ . Is there anything else? Sentence7: I have train TR9956 that departs at 15:59 and will get you there by 17:27. Would that work for you? Sentence8: TR5212 departs from cambridge and arrives at london liverpool street. It leaves on Friday 17:59. Would you like to book it? Sentence9: I am looking for a train to London Liverpool Street. Sentence10: what attractions do you have in the south? Sentence11: There is a lovely park, Wandlebury Country Park. There is a great theatre on Clifton Way as well. It is called The Junction. Do either sound interesting? Sentence12: Thank you and enjoy your stay. Sentence13: Would you like to make another reservation? Sentence14: Your train has been booked, reference number X5EM7DTZ . Is there anything else that you need help with today? Sentence15: There are many trains that travel from Cambridge to London Liverpool Street. What day and time would you like to travel? Sentence16: I do not show an entrance fee amount and the postcode is cb22ad. Can I help you with anything else today? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User