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 need to leave after 17:45 so anytime after that would be great. Sentence2: When would you like to arrive? Sentence3: I have train TR7355 from Cambridge departing at 17:50 and arriving in Ely at 18:07. Would this train work for you or would you like a later departure? Sentence4: Sorry. I really need to be leaving from Cambridge to go to Broxbourne, leaving after 17:45 on Thursday. Arrival time doesn't matter. Sentence5: Sure, do you still need the train on Thursday after 17:45? Sentence6: I apologize this train is going to broxbourne from cambridge. for 3 people are you able to book that? Sentence7: I have 10 trains to Ely Thursday, leaving on the :50 every two hours from 05:50 to 23:50. Did you have a particular time in mind? Sentence8: That's great. I'll need 3 tickets, please. Sentence9: I need a train that leaves this Thursday from Cambridge to Ely. Sentence10: Booking was successful, the total fee is 13.2 GBP payable at the station. Reference number is : WDETDX35 . Sentence11: Yes, that's Broxbourne to Cambridge on Thursday, leaving after 17:45. Sentence12: How about TR9890? It departs Cambridge at 18:01 and arrives in Broxbourne at 19:01. It is 17.90 pounds per ticket. Would you like to book that one? Sentence13: Yes, please. I will need the reference number when you are finished. Sentence14: Your booking was a success. The total fee for 3 tickets is 53.70 GBP, payable at the station, and your reference number is TSUJXVYU . Is there anything else I can do? Sentence15: Thank you, good bye. Sentence16: No that will do , cheers. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User