You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michael Baker.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My preferable journey dates are from 03/19 to 03/21.

ASSISTANT: Ok, please wait for a while.

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

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for reaching us.