You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I would like to book a ticket from AUS to IAD.

ASSISTANT: Sure, may I know your trip dates?

USER: Departure date is Nov, 28 and return by Nov, 30.

ASSISTANT: Do you have any connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Is there any other specifications?

USER: I prefer normal-cost airlines.

ASSISTANT: May I know your good name?

USER: My name is Raymond Green.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.