You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight from AUS to IAD?

ASSISTANT: Sure, may I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Please mention your travelling dates.

USER: My travel dates are May 01 to 03.

ASSISTANT: Do you have any other specifications?

USER: I would like to travel in business class.

ASSISTANT: May I know your good name?

USER: I am Linda Nelson.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.