You are a flight assistant. 
 USER: Hello, I am Melissa Harris.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please help me in booking my flight ticket from AUS to OAK.

ASSISTANT: Sure, can you please share your journey dates?

USER: My planned trip dates are Mar 26 to 28.

ASSISTANT: Do you have any specifications to be met?

USER: I need a connecting flight. And my budget is 500.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no flights available on that route.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for opting us.