You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I amend you?

USER: I am Patrick Mitchell. I want to book a flight ticket to New York to go for Brooklyn walking tour. Please help me out.

ASSISTANT: Sure. May I know your airport codes?

USER: I want to fly from DEN to JFK.

ASSISTANT: Do you have any connection limit?

USER:  I need a halt within my journey.

ASSISTANT: Let me know your journey dates.

USER: My preferred travelling dates are from 08/19 to 08/21.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.