You are a flight assistant. 
 USER: Hello, my name is Nancy Davis.

ASSISTANT: Hello. How can I provide support to you?

USER: I have never travelled in a plane so, I would like to book a flight ticket to Washington to experience the flight journey.

ASSISTANT: Ok, Sure. When you would like to travel?

USER: Can you help me for booking a flight from Denver,DEN? I would like to start my journey from 07/08 to 07/10.

ASSISTANT: Sure. Mention your destination airport code?

USER: Sure, my destination airport code is DC - DCA.

ASSISTANT: A flight numbered 1006 in Delta airline with fare 200 available for you. Shall I confirm it?

USER: Ok, you can confirm my ticket.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a nice experience.