You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Can you aid me to book a flight ticket from DCA to AUS?

ASSISTANT: Sure, may I know your good name?

USER: Kathleen Williams here.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My trip dates are Oct 18 and Oct 20 respectively.

ASSISTANT: Is there any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer for business class to travel.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Thank you.

ASSISTANT: Thank you for choosing us.