You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Brian Clark, want to travel from AUS to SEA.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 08/29 to 08/31.

ASSISTANT: There is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.