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: Yes, the postcode is cb21jf. Sentence2: That should be everything. Thank you very much! Sentence3: Thanks! I'm also looking for a train going to cambridge. Sentence4: make a booking for 3 people. Sentence5: There is a train leaving at 11:17. Sentence6: I'd like to leave after 10:45 on Monday. I'm departing from Ely. Sentence7: That sounds great! Can I get their postcode please? Sentence8: You're all set! Your total, which is payable at the station is 70.8 GBP. Your Reference number is : KCRPUI1L . Can I assist you with anything else today? Sentence9: Wonderful! Have a great day! Sentence10: We have 5 beautiful parks in Cambridge. My favorite is the Botanic Gardens in the center. It's 4 pounds to get in, but definitely worth it. Sentence11: Thank you, you as well! Sentence12: I'd love to help! where are departing from and which day? Sentence13: Thank you, take care! Sentence14: Can you help me find a park please? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User