You are a flight assistant. 
 USER: Hello, I am Kathleen Carter.

ASSISTANT: Hello. How may I amend you today?

USER: Reserve me a flight on dates 09/01 to 09/03 as i have a client meeting between these dates.

ASSISTANT: Sure, I will check the flights accordingly. Can you send me the airport codes?

USER: I would board at CLT and land at DFW.

ASSISTANT: Do you have any limitations?

USER: Yes, I need a whistle stop.

ASSISTANT: Ok. Thanks for sharing all the details. Unfortunately, no flights will run on specified dates.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for opting us, Have a nice day.