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: Okay, you are booked at the bridge guest house for 1 night (Saturday). Your reference number is NVYYU4ML . Can I help with anything else? Sentence2: Thanks so much, I can't wait. Bye. Sentence3: 3 people. Sentence4: I found 5 guesthouses for you. What part of the towns do you prefer to stay? Sentence5: I do not have that hotel at that time, should I try for a shorter stay? Sentence6: Don't mention it. I hope you guys have a blast. Sentence7: All right, I can make a reservation at the Bridge Guest House if you tell me how many people are in your group. Sentence8: Can you find me a place to stay that is moderately priced and includes free parking? Sentence9: The area doesn't matter, I just need to make sure I have a place to stay for 4 nights starting Saturday. Sentence10: Any area would be fine. But do any of the guesthouses have a 3 star rating? Sentence11: Yes. Does it matter what part of town? There is one on the south, one on the north, and one on the west. Sentence12: How about just 1 night? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System