You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from Charlotte CLT to PHL. Can you find a flight ticket for me?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Ok, my planned trip dates are on Aug 18 and return on Aug 20.

ASSISTANT:  Do you require any stopovers in your journey?

USER: I need a direct flight to travel.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: No, I don't have any other specifications.

ASSISTANT: Please share your name.

USER: Sure. I am Joseph Hall.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, not an issue.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your help.