You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Having an interest in doing the Grand Canyon Adventure with my friends. I would like to book a ticket.

ASSISTANT: Sure, may I know on which dates you are willing to travel?

USER: I made a plant to travel on 12/13. With my friends, I have to return on 12/15.

ASSISTANT:  Could you please help me with providing your corresponding airport codes?

USER: The destination is at Oakland, OAK. So I have to fly from Washington, IAD.

ASSISTANT: May I know your name please?

USER: Ronald Jackson is here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found  a connecting flight with Frontier airline is available on your dates which matches your essentials and it costs you only 100. Shall I proceed?

USER: Proceed.

ASSISTANT: Your ticket has been reserved with 1013 flight number.

USER: Thank you for guiding me.

ASSISTANT: Thank you for reaching us.