You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Please help me to book a flight ticket from DC to visit Zilker Park in Austin, can you please help me to book a flight ticket with single connection?

ASSISTANT: Yes, can you share me your travelling dates?

USER: I need to reach Austin on May 31st and my return date will be on June 2nd.

ASSISTANT: Could you tell me your nearest airport codes?

USER: My boarding airport code is DCA and my destination airport code is AUS.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any other specifications.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: That's fine, you can book the ticket.

ASSISTANT: Can I know your name for booking?

USER: I am Karen Roberts.

ASSISTANT: Your ticket is booked.

USER: Thank you for your kind service in booking.

ASSISTANT: Thank you for contacting us.