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: No thank you. Sentence2: Okay and what day would you like to travel? Sentence3: I need to take a train to Cambridge after 09:30. Sentence4: sure, what station are you leaving from? Sentence5: train TR2987 meets all your needs. Shall i book it for you ? Sentence6: Not right now, but could I have the postcode? Sentence7: The postcode is cb17dy. Is there anything else I can help you with? Sentence8: I'm also looking for a recommendation on Mexican restaurants in the south. Sentence9: Thank you for using our service! Sentence10: I will be leaving from Ely. Sentence11: Yes, please for 8 people. Sentence12: I need to depart broxbourne and travel on monday please. Sentence13: I would recommend the Chiquito Restaurant Bar. Would you like to make a booking? Sentence14: Great! Your train will leave Ely on Monday at 11:35 and arrive at 11:52. It has been booked for all 8 for a total fee of 35.2GBP, which is payable at the station. Your reference number, if needed, is PD2F8YMF . Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System