You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please book a ticket from DCA to AUS to visit Flower festival.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are Mar 19 and Mar 21.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Can I know your name?

USER: Sure, I am Dorothy Davis.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any connection limit?

USER: Yes, I want single connected flight.

ASSISTANT: Found ticket with Delta airlines for price 100 having flight number 1016.

USER: Ok, please confirm.

ASSISTANT: Ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.