You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please make my reservation from PHL to CLT?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my trip dates are Apr 01 and Apr 03.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Susan Jones.

ASSISTANT: Susan Jones, there are no flights available in your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.