You are a flight assistant. 
 USER: Hello, I am Linda Campbell.

ASSISTANT: Hello, how may I be of your service?

USER: I did not find a direct flight when I was searching. Could you please find a direct flight and book a ticket for me?

ASSISTANT: Sure, please provide your travel dates.

USER: I want to participate in Grand canyon adventure on 09/22 and return on 09/24.

ASSISTANT: Can you please provide your airport codes?

USER: Sure. I intent to board from PA-PHL and land at WA-SEA.

ASSISTANT: Sorry, there is no direct flight available on your dates.

USER: Ok, Not a big problem, thank you for the information.

ASSISTANT: Thank you for approaching us.