You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for your help?

USER: I am Charles Edwards. I want to host Food Festivals at my home town, can you help me to book a direct flight?

ASSISTANT: Sure, may I know when would you like to travel?

USER: Sure, I would like to travel on 09/03 and intend to return on 09/05.

ASSISTANT: Kindly mention your airport codes.

USER: Sure, my origin airport is Atlanta, GA - ATL and destination airport is Philadelphia, PA - PHL.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available on your required dates.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for choosing us.