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: what's the most expensive one? Sentence2: There are 17 Chinese places that you may like, do you have further criteria to narrow it down? Sentence3: that is it for today thank you for asking Sentence4: No, that's okay. Can I book a table for 2 on friday at 15:15? Sentence5: Do you need anything else? Sentence6: I need 2 tickets please. Sentence7: Wonderful. Is there a type of cuisine that interests you? Sentence8: the total fee is 37.76 GBP payable at the station, reference number TKP9K1U4 . Sentence9: Good morning, I am looking forward to trying some local restaurants when I arrive in Cambridge next week. Sentence10: Yes, can you check Chinese for me please? Sentence11: I'm sorry there appear to be no modern American restaurants in the area. Would you like to try something else? Sentence12: No. I would like you to pick the best one you know of. Sentence13: Booking was successful. The table will be reserved for 15 minutes.Reference number is : LZ2KI6G5 . Sentence14: How many tickets do you need? Sentence15: In that case, I would recommend the Sesame Restaurant and Bar. Would you like to know more about it? Sentence16: I would like to try some modern American food. Sentence17: Would the TR4003 train departing at 13:00 and arriving in london by 13:51 work for you? Sentence18: Thank you for your help. Sentence19: You're welcome. Have a great day. Sentence20: Thank you. I also need train information. We are planning to leave on Saturday at some time after 11:45. Sentence21: I have nine in the expensive range. Is there an area you prefer? Sentence22: Yes. That works. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System