You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please check for the flights from ATL to HOU?

ASSISTANT: Sure, would you please provide me your itinerary travel dates?

USER: My journey dates are form Dec 15 to Dec 17.

ASSISTANT: Is there any time concern?

USER: I need a direct flight for my journey.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Daniel Brown.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Daniel Brown. I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.