You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Solution: Answer: (A) User
Why? The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input: Sentence1: I'm sorry, the book was unsuccessful. Would you like to try for another date or a shorter stay? Sentence2: Okay, when would you like to leave or arrive by? Sentence3: How about for only a one night stay? Sentence4: I am looking fro something cheap with a 0 star rating. Sentence5: I would also like to know about fun things to do in town. What types of entertainment is available near the hotel? Sentence6: Great! I have a yellow honda set to pick you up. The contact number is 07441052837 Sentence7: Cityroomz will be fine. I need a room for 2 nights starting Thursday. There will be a total of 8 guests. Sentence8: Thank you! What is the reference number? Sentence9: There are no cheap hotels with 0 stars in the centre. Would you like to book cityroomz? It is a hotel that has 0 stars and it is moderately priced. Sentence10: Sadly I couldn't book Cityroomz. But I was able to book Alexander Bed and Breakfast a 4 star guesthouse for an even cheaper rate for one night with 8 guests. Sentence11: Glad to be of service! Sentence12: Thank you! That's all I need today. You've been very helpful. Sentence13: There is no entertainment in the centre would you like to look for another type of attraction? Sentence14: I want to leave my hotel no later than 17:15. Sentence15: I need a place to stay in the centre of cambridge. Sentence16: do you have any constraints regarding cost or quality? Sentence17: In that case can you tell me the address of some of the colleges in the area? Sentence18: Can you give me the full address for Downing College please? Sentence19: No thanks, but I'd like to book a taxi between the two locations, please. Sentence20: I would like to book a hotel. Sentence21: Downing College is on Regent Street with the postal code cb21dq. Would you like the phone number? Sentence22: How does El Shaddai sound? It is a cheap guesthouse with 0 stars located centrally. It includes both free wifi and free parking? Sentence23: We have Gonville and Caius College on Trinity Street, Emmanuel College on Saint Andrew's Street, and Downing College on Regent Street. Sentence24: Your reference number is 6MYWN42P . Question: Who has spoken the sentence 4? (A) User (B) System
Solution:
Answer: (A) User