You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Davis.

ASSISTANT: Davis, how may I assist you today?

USER: I am planning to visit Freedom park at Charlotte, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with booking, may I know your airport codes?

USER: My nearest source airport code is DEN and destination airport code is CLT.

ASSISTANT: Ok, let me know your travelling dates to proceed further?

USER: I would like to take off on 07/19 and return on 07/21.

ASSISTANT: Sorry for the inconvenience Davis, no flights as per your details.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for utilising our services.

USER: Anyways, thank you for the information.