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: The TR2819 fits the bill, would you like me to book you passage? Sentence2: There are 133 trains traveling from Stansted Airport to Cambridge between Friday and Wednesday. What day did you want to travel? Sentence3: I need to a train that goes to Cambridge, from Stansted Airport. Sentence4: No, that's it. Thank you. Goodbye. Sentence5: Alright I've made that booking they will hold the table for 15 minutes and the reference # is 0VES7LP4 . Is there anything else i can help you with? Sentence6: i would like to travel friday around 2pm Sentence7: There is The Gardenia in the centre that meets your criteria. Would you like me to book it for you? Sentence8: Did I mention I need two tickets? There are 2 of us. Sorry. Sentence9: Not a problem. The reference number is BYTSKQJT, and the price is 20.2 GBP, payable at the station. Is there anything else I can assist you with? Sentence10: Booking was successful, the total fee is 10.1 GBP payable at the station .Reference number is : LQ076J6Z . Sentence11: I also want to find a restaurant that serves Mediterranean food for a cheap price. I'd like a reservation for 2 people that same day. Sentence12: yes please and a reference number please thank you Sentence13: You're welcome, have a great time. Sentence14: Sure, please book it for saturday at 17:15, for 2 people. And tell me the reference number Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System