You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Moore.

ASSISTANT: Jacob, how can I help you today?

USER: Can you please search for the direct flight from HOU to DEN? I have to visit Denver to meet my childhood friend.

ASSISTANT: Please share your dates of journey.

USER: I will depart on 12/23 and return on 12/25.

ASSISTANT: Give me a minute please.

USER: Sure.

ASSISTANT: Sorry Moore, no flight is available for you as per your requested dates.

USER: No problem, thank you for checking.

ASSISTANT: Thank you so much, have a nice day.