You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: Myself Linda Allen.

ASSISTANT: How can I assist you, Linda?

USER: Is there any direct flight to CLT on 11/03, because I have to attend a summit in Charlotte on 11/04?

ASSISTANT: Please provide me your origin airport code along with return date, so that I will check the flight availability.

USER: Sure, My origin airport code is PHL. I want return to PHL from CLT on 11/05.

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

USER: It's ok, no problem. Thank you for assisting me.

ASSISTANT: Thank you for using our service.

USER: You are welcome.