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: Enjoy your visit to cambridge and gave a good day. Sentence2: No, you have been very helpful, thank you. Good bye. Sentence3: Great can you book that for one person? Sentence4: I'd be glad to. We have 13 colleges in the centre. Most are free to visit, such as Christ's College over on Saint Andrew's Street. Sentence5: Thanks! Can you help me find a college to visit in the centre? Sentence6: I have heard of Christ's College. Is there a more detailed address? I would also like their phone number, please. Sentence7: I only have an address of St. Andrew's Street, but the phone number is 01223334900 if you would like to call them. Anything else I can help with? Sentence8: I will be leaving on a Tuesday and I would like to arrive by 17:30. Sentence9: TR4887 leaves at 05:40 Sentence10: I can find you quite a few trains for your trip. On what day will you be traveling, and at what time would you like to depart? Sentence11: I'm planning a trip to Cambridge and need info on trains. I am coming from Birmingham New St. Sentence12: Done and done! Booking was successful, the total fee is 75.09 GBP payable at the station. Your Reference number is : Q649D1SU . Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User