You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Barbara Harris here. I want to book a flight ticket from AUS to EWR. Can you help me in that?

ASSISTANT: Sure, May I know the travel dates?

USER: My travel dates are June 26 to 28.

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.