You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Rodriguez.

ASSISTANT: How can I assist you?

USER: I am planning to visit Seattle, can you please book me a ticket with direct flight from Austin?

ASSISTANT: Sure, may I know your airport codes please?

USER: My nearest airport codes of journey are from AUS to SEA.

ASSISTANT: Ok, please share your preferable journey dates.

USER: My planned dates of journey are from 02/14 to 02/16.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: William, there are no direct flights available for you on those dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.