You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffery Hill here.

ASSISTANT: How can I aid you?

USER: I want to book a flight reservation on the route from BOS to AUS, can you help me out?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates will be from 06/27 to 06/29.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: No issues.

ASSISTANT: Sorry to say, there are no flights available for your desired dates.

USER: Thank you for checking anyways.

ASSISTANT: Thank you for opting us.

USER: Most welcome.