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, that's all today. Thank you for your help! Sentence2: I'll be leaving from london liverpool street and I need to arrive in Cambridge by 11:15. Sentence3: Little Seoul is the only Korean restaurant in the center of town, and it is expensive. Would you like to book a table there? Sentence4: I would also like to book a train to Cambridge that day. Sentence5: I would like a place that serves Korean food. Sentence6: Ok. You are all ready to go. Your reference number is 52BZEK4D . The total fee is 33.2 GBP payable at the station. Can I help you with anything else? Sentence7: Thank you have a great day. Sentence8: Are there any expensive restaurants that are centrally located? Sentence9: There are many restaurants that meet your criteria, is there a specific type of food you would like to eat? Sentence10: Okay you're all ready to go! Your reference number is Y8V4909W . Can I help you with anything else? Sentence11: Where are you leaving from? Sentence12: That sounds just delightful! I would like a reservation for two at 20:00 for Friday. And I will need that reference number, please. Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User