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 you booked on the TR0637 train. The total cost is 16.60 GBP, and the reference number is KQMHCZNL . IS there anything else that I can help you with? Sentence2: I want to leave after 08:45 please Sentence3: yes, i will book that Sentence4: We have a large amount of trains that day, is there a specific location? Sentence5: Tell me the arrival time of the 09:39 train please Sentence6: The first train to London Liverpool street is at 09:39 and arrives at 11:07 in Cambridge. Does this time work for you? or would you like later? Sentence7: Thank you for using the Cambridge TownInfo Centre. Goodbye! Sentence8: Sure. The 9:30 train leaves London Liverpool Street on Friday and arrives in Cambridge by 11:07. Would you like me to book that? Sentence9: No that is everything that I need. Thank you so much for your help. Sentence10: I'm sorry. There is no train leaving from london live to cambridge on friday by 8:45. Would you like to try a different day or time? Sentence11: what are the available options Sentence12: I want to go from london liverpool street to cambridge. Sentence13: What time would you like to leave? Sentence14: I apologize for the earlier confusion, we do have trains leaving every two hours starting at 09:39 until 01:07am. Which time works for you? Sentence15: Yes, please help me book a train on Saturday. Sentence16: Of course, how many tickets will you need? Sentence17: I just need one ticket please. Sentence18: Oh sorry, I wanted a train on Friday, not Saturday. Anything after 08:45 from london liverpool street. to cambridge. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System