You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: I'll be commuting between the restaurant and the college. I want to book at taxi to pick me up at the restaurant by 12:30. Sentence2: I am also interested in finding out information about local colleges. Do you recommend any to visit? Sentence3: We have discussed a restaurant and a college, did you have a hotel you wished to stay at? Sentence4: I can suggest ask located at 12 Bridge street city centre. Would you like to make reservations? Sentence5: Sure, where will you be headed? Sentence6: You should check out the downing college on regent street. Do you want me to get you their phone number? Sentence7: Yes I would like to eat Italian food. Sentence8: cb21uf. Is there anything else I can do to assist you? Sentence9: Between the restaurant and the hotel. Sentence10: Glad to have been of help. Thank you for using the Cambridge TownInfo centre. Have a great day Sentence11: No, that's all I needed. Thank you for your help. Have a great day. Sentence12: I would like to book a taxi now please. I need to leave the restaurant by 12:30. Are there any available? Sentence13: A grey Tesla will pick you up, contact number 07587024658. Can I help you with anything else today? Sentence14: I'm looking for a restaurant that is cheap and is in the centre. Can you help me? Sentence15: Where you interested in any particular type of cuisine? I have some restaurants like that including: Indian, Chinese, and Italian. Do you have a preference? Sentence16: their post code is cb21dq. it is located in regent street. phone number is 01223334860. Sentence17: Yes please. I would like their postcode, phone number, and address. Sentence18: No, please give me their postcode instead Question: Who has spoken the sentence 5? (A) User (B) System
A:
Answer: (B) System