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'm looking for a train that leaves from London Liverpool Street on Thursday, is there any information you can give me about something like that? Sentence2: Success! Your 3 seats are reserved and the total will be 49.8 GBP, payable at the station. Your reference number is SQ22G015 . Can I do anything further for you? Sentence3: Which area would you like for the nightclub? we have 5 in centre and 1 in south. Sentence4: You're welcome! Is there anything else I can do for you? Sentence5: There are three choices. The TR3839 departs London at 05:39 and arrives Cambridge at 07:07. That's the earliest departure. Would you like to book a ticket? Sentence6: Yes, for 3 people, please. Sentence7: In my opinion, the nicest one is Kambar nightclub. It's in the centre of town. Would you like more information on it? Sentence8: It doesn't matter, what would you recommend? Sentence9: Their phone number is 01223842725, and they are located at 1 wheeler street. Sentence10: Great! Thanks for your help today! Sentence11: Goodbye! Have a great day! Sentence12: Sure, can I have the phone number and address? Sentence13: Yes. Trains leave from London Liverpool Street every two hours, starting at 05:39. Was there a particular time of day you were interested in? Sentence14: No, you've covered everything. Goodbye. Sentence15: Yes, I'd also like to find a place to go. I was thinking a nightclub would be fun. Sentence16: I would like to arrive by 11:00 in Cambridge. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System