You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I want to visit white house at Washington, can you please help me to book a ticket from AUS to DCA?

ASSISTANT: Sure, help me with the travelling dates.

USER: Ok, my planning is from 07/30 to 08/01.

ASSISTANT: Give me a minute.

USER: Sure, take your time.

ASSISTANT: There is a direct flight on your requested dates with fare 200. Can I book it?

USER: Ok, please book it.

ASSISTANT: Your ticket is booked, happy journey. May I know your name?

USER: Ok, my name is David Lopez.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.