You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am visiting the Denver botanical gardens, can you please find me a ticket to Denver?

ASSISTANT: Sure, on which dates you are planning to fly?

USER: My planned dates are from 11/12 to 11/14.

ASSISTANT: Could you help me with your airport codes?

USER: My origin airport code is DCA and my destination airport code is DEN.

ASSISTANT: Please wait for a moment.

USER: Sure, please search for a direct flight for me.

ASSISTANT: I have found a flight-1006 travelling towards your destination, shall I proceed?

USER: Please proceed my ticket booking with the name of Nicholas White.

ASSISTANT: Sorry there is no direct flight with your details.

USER: Ok, no issues. I will choose any other mode of transport to reach Denver.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Welcome.