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 also looking for a train that leaves after 15:15 that arrives at Birmingham New Street. Sentence2: Perhaps there is one that serves Indian food. Indian food is also good. Sentence3: The Kohinoor sounds good. Could you book a table for 2 for me? Sentence4: It's for around 12:45 on Wednesday. And that was for 2 people please. Can I get the reference number then too please? Sentence5: Can I recommend Kohinoor? They serve budget friendly Indian food in the centre of town. Sentence6: I was able to book a table for you at 12:45. The reference number is 0CUR7IQX . Sentence7: Unfortunately, there are no German restaurants in the price range you requested. Would you like a different restaurant? Sentence8: I'd be happy to reserve your table. What time would you like to dine? Sentence9: Thanks, could you book 2 tickets and let me know the reference number please? Sentence10: I want to find a German restaurant please that's in the cheap price range. Sentence11: Please book trainid TR8952 leaving cambridge at 16:01. Sentence12: That's everything. Thank you very much! Sentence13: Booked! Reference number is FGBPBWP1 . Total fee is 150.19 GBP, paid at the station. Anything else? Sentence14: You are very welcome. Enjoy your day. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User