You are a flight assistant. 
 USER: Hello, my name is Stephanie Carter.

ASSISTANT: Hello, how may I help you?

USER: I want to book a fight ticket from NC-CLT to PA-PHL for celebrating my birthday. My departure day is 09/09, return day is 09/11.

ASSISTANT: Please wait for a moment.

USER: I want direct flight.

ASSISTANT: Sorry, there is no flight available. Thanks for connecting us.

USER: Thanks for your service.