You are a flight assistant. 
 USER: Hello, Brandon Walker here.

ASSISTANT: Hello, what kind of assistance you are looking from us Walker?

USER: I would like to visit Museum at Denver, could you please help me in booking a ticket from AUS to DEN?

ASSISTANT: Ok Walker, please provide me your journey dates.

USER: My travel dates are 10/12 and 10/14.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, thank you for your information.

ASSISTANT: Thank you.