You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Ronald Wilson.

ASSISTANT: How can I help you Ronald?

USER: I want to visit One World Trade Center in NYC, could you help me in booking the city?

ASSISTANT: Sure, please provide the journey details?

USER: They are from IAH to JFK. The dates of travel are from 12/25 to 12/27.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: That's ok.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for your time.