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: Nope, that's it. Thanks for your help. Sentence2: Booking was successful. The table will be reserved for 15 minutes. Reference number is : QLK6MOBC . You are all set! Anything else I can help with? Sentence3: The Ugly Duckling is a fantastic Chinese place in the center of town. It's expensive, but worth it. I'd be happy to book a table, if you like. Sentence4: Okay, I'd be happy to book that for you. Where would you like to go? Sentence5: Great. I'm also looking for information on the Ugly Duckling restaurant. Sentence6: I'm going to Cambridge from New Street in Birmingham Sentence7: I need to make sure that I will arrive by 09:15? Sentence8: Yeah, that train will get you there by 8:23. Sentence9: I want a train that leaves on wednesday. Sentence10: Yes, please! I'd like a table for 1 at 15:15 on the same day as the train. Sentence11: You are welcome. Enjoy your stay in Cambridge. Bye. Sentence12: How about train TR0014, leaving at 05:40? Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System