You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a ticket from SEA to AUS, can you help me?

ASSISTANT: Sure, may I know your name please?

USER: I am Katherine Brown.

ASSISTANT: Ok, may I know your travelling dates of journey please?

USER: My travel dates are May 29 and 31.

ASSISTANT: Is there any specific class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications please?

USER: I need a direct flight in my journey.

ASSISTANT: Sorry Brown, there is no flight found as per your travelling details.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.