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

ASSISTANT: Hello, how may I lend a hand to?

USER: I want to book a flight ticket from CLT to AUS, can you please help?

ASSISTANT: Barbara, could you please share me your travel dates?

USER: My planned travel dates are 05/26 and 05/28.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Barbara sorry to inform, no flights are available with your criteria.

USER: No worries, thank you for your information.

ASSISTANT: Thank you Barbara for utilizing our agency.