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: You're welcome. Let me know if you think of anything else you need. Sentence2: I have two in that range, in the centre. Is that area the right area for you? Sentence3: I also need a train from Cambridge to London kings cross that leaves on Friday and arrives at 17:00. Sentence4: Need a place to eat with moderate prices, but needs to have russian food. Sentence5: Yes, that area's fine. Can you make a reservation for 6 people on Thursday at 5:30 pm with one of them? Sentence6: Would that be at 5:30 pm (17:30)? Sentence7: Yes, it would. Can you book me 6 tickets for that for Friday please? Sentence8: The closest to that time is TR2420 which leaves Cambridge at 15:00 and arrives in London, Kings Cross at 15:51. Would that meet your needs? Sentence9: Yes, could I have the reference number as well please? Sentence10: Can you try 16:30? Sentence11: What about a Turkish restaurant instead? Sentence12: Unfortunately, I wasn't able to find anything matching your request. Shall we look for a cheap restaurant instead? Sentence13: Sorry booking was unsuccessful. Can you try a different time or day? Sentence14: No, I think that is all for today. Thank you for all your help! Sentence15: I was able to make that reservation at 16:30 your reference number is AKF1B848 . Sentence16: Ok, I've booked 6 tickets, reference number FFVH42H7 . Your total is 141.6 GBP payable at the station. Is there anything else I can help you with? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System