You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Could you please check the flight availability in normal cost airline?

ASSISTANT: Sure, I can help you with that. May I know your source and destination airport codes please?

USER: My source is AUS and destination is DCA.

ASSISTANT: On which dates are you planning to depart and arrive?

USER: I want to travel on Mar 20 and return on Mar 22.

ASSISTANT: Do you prefer stopover in between your journey?

USER: Yes, I prefer a stopover.

ASSISTANT: Please let me know if you have any other specifications.

USER: I don't have any other specifications.

ASSISTANT: May I know your good name please?

USER: My name is Deborah Baker.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details. Thank you for choosing us, have a nice day.

USER: Not a problem, thank you.