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 apologize for the extended wait. Your seats have been reserved. Your reference # is LR5KLQWT . Is there anything else I can assist you with? Sentence2: You're welcome! Please contact us if you need additional assistance during your visit to Cambridge! Sentence3: That sounds great! Thanks for all your help; that's all I needed today. Goodbye! Sentence4: Did you complete the booking? I need the reference number. Sentence5: I sure can! What day and times are you looking for? Sentence6: Great I'm also looking for a park to visit in the centre of town. Sentence7: I'll be coming in from Norwich on Friday. I'll need to leave after 11:30, please. Sentence8: Can you help me find a train to Cambridge? Sentence9: Yes, I'd be more than happy to book TR9900 for 5 people. Would you like a reference number? Sentence10: Yes please give me the reference number Sentence11: How about TR9900 that leaves at 05:16? Sentence12: Okay. The only park in the centre is cambridge university botanic gardens. Their address is bateman street, postcode is cb21jf, phone number is 01223336265, and the entrance fee is 4 pounds. Sentence13: Give me one moment to complete the booking. Sentence14: That sounds just like what I needed. Can you please make a booking for 5 people? Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System