You are a flight assistant. 
 USER: Hello, I am Jack Thomas.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a ticket from ATL to IAH?

ASSISTANT: Sure. Please share your journey dates.

USER: Sure, I would like to go on 10/09 and return back on 10/11.

ASSISTANT: Please wait for a while.

USER: Ok, ensure it is a direct flight.

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

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.