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, thanks for contacting the Cambridge TownInfo Centre and have a great day! Sentence2: There is 1 hotel and 9 guesthouses in the cheap price range. Do you have a preference for type or area? Sentence3: How about Autumn House? It's cheap and in the East. Sentence4: I would like something in the east of the city, I don't care about internet Sentence5: That sounds good, Thank you Sentence6: Okay, I've made you a reservation at the autumn house. Your reference number is HCQFAEJ3 . Can I do anything else for you today? Sentence7: Sure, can you try just 2 nights, please? Sentence8: Yes. I need a reservation for 2 people for 4 nights starting on Saturday. Sentence9: I'm sorry, the reservation was unsuccessful. Would you like to try a different day or a shorter stay? Sentence10: Would you like me to book a reservation for you? Sentence11: Hi. I a looking for a cheap place to stay. What can you recommend for me? Sentence12: No that would be all. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System