Query: user: Hi, are there any nice attractions which I can visit?
assistant: Yes there is, but may I know which location do you currently prefer?
user: I would prefer attractions in London, UK, without an entry fee.
assistant: Sure, there are 10 attractions which you may like, how about a Historical Landmark called 30 St Mary Axe (The Gherkin).
user: I see, are there any alternatives, would prefer a mall which is child-friendly.
assistant: There are 3 attractions available, one of which is a shopping area called Camden Market.
user: I see, how can I contact them?
assistant: You can call them at 20 7485 5511.
user: I see, are there any alternative attractions I can visit?

Intent: Travel:FindAttractions