You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Lewis.

ASSISTANT: Anna, how can I help you today?

USER: I am planning to visit Houston, can you please book me a ticket from ATL to HOU?

ASSISTANT: Ok, please share your travel dates to proceed further.

USER: My preferable journey dates are from 12/16 to 12/18.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, please search for direct flight on this route.

ASSISTANT: Sorry Anna, no direct flight is available for you.

USER: Ok, not an issue. I will find any alternate for this trip. Anyways, thank you for providing information.

ASSISTANT: Thank you for reaching us.