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: Ok. I can help you book a taxi from Scudamores Punting. Where do you want to go from there? Sentence2: Yes, are there any kind of boat tours available through town? Sentence3: Great! I have booked your taxi, which should be a White BMW and its contact number is 07719541714. Sentence4: I'd like to stay on Wednesday, Thursday, and Friday, please. Is that available? Sentence5: To my hotel. Sentence6: In the centre of town, if possible. Sentence7: I'm looking for a guesthouse that offers free parking. Sentence8: There are a few. Do you care what part of town? Sentence9: It was a pleasure assisting you. Enjoy your stay. Sentence10: May I assist you with anything else today? Sentence11: I have many options available. Would you like to stay in a particular area of town? Sentence12: Of course! When would you like to stay? Sentence13: The aylesbray lodge guest house meets all of your requirements and has a 4 star rating. Would you like me to book a room? Sentence14: That's all I need. Thanks Sentence15: Yes, actually I prefer to stay in the south part of town. And I would love something that offers free wifi. Sentence16: Great! Your room has been booked for 3 nights starting Wednesday and your reference number is NVZNJX13 . Is there anything else that I can help you with? Sentence17: Yes, could you make a reservation for 8 people, please? Sentence18: Great, thank you! Sentence19: Yes there are two companies that offer boat tours in the centre of town, Scudamores Punting and The Cambridge Punter. Would you like more information? Sentence20: Sure but I also need to book a taxi to leave the attraction by 6:45. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System