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'm sorry, neither hotel is available for that booking. Would you like me to try a different day or shorter stay? Sentence2: No, it just seems as though our system is experiencing an error. Can you please restate your restaurant requirements? Sentence3: What do you mean? Do you have another suggestion? Sentence4: Thank you. Do I need a reservation number for the taxi? Sentence5: The Oak Bistro for 5 people on Sunday at 16:45. Also I am looking for a 3 star hotel in the expensive price range with free parking. Sentence6: You're booked at the Oak Bistro (Ref #QUJHQIMG). There are two hotels available: one in centre and one in south. Do you have a preference? Sentence7: What type of food does the Oak Bistro in Cambridge serve? Sentence8: Thanks. I'll also need a taxi from the hotel to the restaurant. I need to make sure I get there by the 16:45 reservation. Sentence9: Could I get the contact number and type of car for the taxi please. Sentence10: The Oak Bistro serves British food. Would you like to book there? Sentence11: No preference as long as it has 3 star, expensive price range, and free parking. I need it booked for 5 people for 5 nights starting Sunday. Sentence12: Are you sure this is the location you are looking for? Sentence13: Great your reference number is DK2CZK2P . Sentence14: No problem, you have a lovely day! Sentence15: Thank you so much for your help today. Sentence16: Yes, please book a table for 5 on Saturday at 16:45. May I get the reference number for that once you've booked it please? Sentence17: Is it available for 2 nights then? Sentence18: I almost forgot; I need the hotel name, LOL. Sentence19: The car is a yellow tesla. Contact number: 07951091729 Sentence20: I have booked your taxi as well. Is there anything else I can do for you today? Sentence21: No you do not need a reservation number for the taxi. Is there anything else I can help you with? Sentence22: Of course! Your reservation is at the Gonville Hotel. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System