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: Glad I could be of assistance. Have a great day! Sentence2: Sure, their phone number is 01223446100 and their postcode is cb11ly. Is there anything else I can help you with? Sentence3: No thanks. But can I get the phone number and postcode please? Sentence4: I have it booked for you. Your reference number is knutp0u4 . Can I be of further assistance? Sentence5: I love swimming! Can you recommend a pool in Cambridge? Sentence6: Yes, please for one. I will need the reference number Sentence7: Sure, I would be glad to help. Where will you be departing from? Is there a particular time you'd like to arrive by? Sentence8: The first train leaving cabridge for leicester on Sunday is TR9517. It leaves at 18:21. Would you like me to book a seat on that train? Sentence9: i am also looking for a train that leaves after 18.00 on sunday Sentence10: Parkside Pools is located in the centre of town. Would you like the address? Sentence11: No thanks, that's everything! Sentence12: I will be departing from Cambridge to Leicester. The arrival time does not matter as long as it leaves after 18:00. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User