You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Matthew Evans. I am planning to travel from AUS to SEA, help me in booking a flight?

ASSISTANT: May I know your desired travel dates please?

USER: My travelling dates are 08/07 to 08/09.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.