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 want to arrive by 11:15. Sentence2: Okay we have the de luca cucina and bar and the riverside brasserie. Which one would you like? Sentence3: Sure, what day do you want to travel? Sentence4: Do you have a preferred time frame ? Sentence5: Let's do the riverside brasserie. What about a table for 3 at 15:00 on Saturday? Sentence6: Great I also need a train that should depart cambridge and head to ely. Sentence7: TR3177 will arrive by 10:07 and leaves at 09:50 would you like me to book it for you? Sentence8: i will do modern european food Sentence9: I would like to leave on a Sunday. Sentence10: Can you check if there are any moderately priced restaurants in the centre of town? Sentence11: Yes, there are several. Do you prefer Asian or British food? Sentence12: No that is all. Thank you. Goodbye Sentence13: You are set, the total fee is 3.52 GBP payable at the station, your Reference number is WVJC995L . May I help with anything else? Sentence14: Ok. Thank you. Goodbye. Sentence15: Yes, please. Include the reference number please Sentence16: Booking was successful. The table will be reserved for 15 minutes. Reference number is : TYDEG9IJ . Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System