You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in booking a ticket from HOU to CLT?

ASSISTANT: Sure, may I know your travel dates?

USER: I am planning to start on Dec 7th and return back on Dec 9th.

ASSISTANT: At what time do you like to travel?

USER: Any timings is ok for me.

ASSISTANT: Please wait.

USER: Take your time.

ASSISTANT: May I know your name please?

USER: I am Gregory Robinson.

ASSISTANT: Sorry, there is no flight on your travel dates.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you.